Merge pull request 'fix: Type string interpolations in ContentView for Swift 5.7 compatibility' (#57) from hotfix/macos12-string-interpolation into develop

M6 bugfix release: restores all telemetry sections (snapshot contract,
SMC service+struct fixes), alert false-positive filtering, and sidebar
selection.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.gitea/workflows/build.yml

@@ -12,7 +12,7 @@ concurrency:
 jobs:
   build-and-test:
     name: Build & Test (Intel x86_64)
-    runs-on: macos-14
+    runs-on: macos-12
 
     steps:
       - name: Check out repository
@@ -78,7 +78,7 @@ jobs:
   release-package:
     name: Package Release Artifact
     needs: build-and-test
-    runs-on: macos-14
+    runs-on: macos-12
     if: startsWith(github.ref, 'refs/tags/v')
 
     steps:
@@ -111,19 +111,23 @@ jobs:
           codesign --force --deep --sign - "$APP"
           codesign --verify --verbose "$APP"
 
-      - name: Create Distribution Archive
+      - name: Create Distribution Disk Image (.dmg)
         run: |
           APP="$PWD/DerivedData/Build/Products/Release/MacMonitor.app"
-          cd "$(dirname "$APP")"
+          DMG_STAGING="$(mktemp -d)/staging"
-          ditto -c -k --sequesterRsrc --keepParent "MacMonitor.app" "$GITHUB_WORKSPACE/MacMonitor-intel-x86_64.zip"
+          mkdir -p "$DMG_STAGING"
-          ls -lh "$GITHUB_WORKSPACE/MacMonitor-intel-x86_64.zip"
+          cp -R "$APP" "$DMG_STAGING/"
+          ln -s /Applications "$DMG_STAGING/Applications"
+          hdiutil create -volname "MacMonitor" -srcfolder "$DMG_STAGING" -ov -format UDZO "$GITHUB_WORKSPACE/MacMonitor-intel-x86_64.dmg"
+          rm -rf "$(dirname "$DMG_STAGING")"
+          ls -lh "$GITHUB_WORKSPACE/MacMonitor-intel-x86_64.dmg"
 
       - name: Upload Workflow Artifact
         uses: actions/upload-artifact@v4
         continue-on-error: true
         with:
           name: MacMonitor-intel-x86_64
-          path: MacMonitor-intel-x86_64.zip
+          path: MacMonitor-intel-x86_64.dmg
 
       - name: Create Gitea Release & Attach Artifact
         run: |
@@ -147,7 +151,7 @@ jobs:
             echo "ERROR: could not resolve release ID for $TAG"; exit 1
           fi
 
-          curl -sS -X POST "$API/releases/$RELEASE_ID/assets?name=MacMonitor-intel-x86_64.zip" \
+          curl -sS -X POST "$API/releases/$RELEASE_ID/assets?name=MacMonitor-intel-x86_64.dmg" \
-            -H "$AUTH" -H "Content-Type: application/zip" \
+            -H "$AUTH" -H "Content-Type: application/x-apple-diskimage" \
-            --data-binary @"$GITHUB_WORKSPACE/MacMonitor-intel-x86_64.zip" \
+            --data-binary @"$GITHUB_WORKSPACE/MacMonitor-intel-x86_64.dmg" \
             -o /tmp/asset.json -w "attach_asset_http=%{http_code}\n"

.gitignore

@@ -25,3 +25,7 @@ xcuserdata/
 *.dmg
 *.zip
 *.app
+FIRST-PASS-REFERENCE.md
+SECOND-PASS-REFERENCE.md
+Docs/AppleSilicon-plan.md
+Docs/Monterey-plan.md

BUILD-PLAN.md

@@ -3,7 +3,7 @@
 ## 1. Project Specifications & Architectural Constraints
 
 - **Platform Target:** macOS for Intel (`x86_64`).
-- **Minimum OS Version:** macOS 14.0 (Sonoma) or higher.
+- **Minimum OS Version:** macOS 12.0 (Monterey) or higher.
 - **Language Stack:** SwiftUI (Presentation & ViewModels) + Objective-C / C (Low-level Mach, IOKit, SMC, BSD Sysctl APIs).
 - **Interoperability:** Modular Objective-C bridging layer (`MacMonitor-Bridging-Header.h`) exposing thread-safe C primitives to Swift.
 - **CI/CD Platform:** Gitea Actions executing on Intel macOS runners (`[macos, intel]`).
@@ -144,7 +144,7 @@ graph TD
   2. **Phase 1.2 (Parallel Tracks):**
      - **Track 1.2A:** `#2` AppleSMC Client (`feat/2-smc-client`). Low-level SMC key reader, data parsers (`sp78`, `fpe2`, `flt`).
      - **Track 1.2B:** `#25` Gitea CI/CD Pipeline (`feat/25-gitea-ci`). Create `.gitea/workflows/build.yml` targeting Intel runners.
-- **Quality Gate M1:** Successful build and execution of sample test suite on Gitea Actions runner compiling for `x86_64` macOS 14.
+- **Quality Gate M1:** Successful build and execution of sample test suite on Gitea Actions runner compiling for `x86_64` macOS 12.
 
 ---
 
@@ -189,7 +189,7 @@ graph TD
 
 ### Milestone 4: Presentation, Visuals & Menu Bar Integration
 - **Integration Branch:** `milestone/m4-presentation`
-- **Goal:** User-facing presentation layer: macOS 14 Menu Bar Extra, popover widgets, display brightness management, and Swift Charts rolling graphs.
+- **Goal:** User-facing presentation layer: macOS 12 Menu Bar Extra, popover widgets, display brightness management, and Swift Charts rolling graphs.
 - **Execution Order:**
   1. `#13` Screen Brightness & Display Management (`feat/13-display-brightness`)
   2. `#22` Status Bar Menu Bar Extra & Popover (`feat/22-menubar-popover`)
@@ -203,7 +203,7 @@ graph TD
 - **Goal:** Proactive health alerts, macOS Notification Center integration, end-to-end regression validation, and release packaging.
 - **Execution Order:**
   1. `#24` Threshold Alerts & Notification Center (`feat/24-threshold-alerts` - Depends on #3, #4, #8, #9)
-  2. Full end-to-end integration testing and automated release archiving (`MacMonitor-intel-x86_64.zip`) on tagged commit.
+  2. Full end-to-end integration testing and automated release archiving (`MacMonitor-intel-x86_64.dmg`) on tagged commit.
 - **Quality Gate M5:** Zero crashes, all unit test suites passing on Intel macOS runner, DMG/ZIP distribution artifact ready.
 
 ---

MacMonitor.xcodeproj/project.pbxproj

@@ -16,6 +16,7 @@
 		1B15F48F6B19E9EA4556ECD5 /* MMStorageTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 78325870C7CD8312AECA2236 /* MMStorageTests.swift */; };
 		1B3F1C8ABF0ADFAA290FF6F6 /* MMSMCParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 375AA781A2AA0A20B119C7B7 /* MMSMCParser.m */; };
 		22CA7351A745F7837E487051 /* MMPeripheralsTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D1486E1512594482380CB492 /* MMPeripheralsTests.swift */; };
+		2665E9DAE13C13239857B4BB /* MMSnapshotContractTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EA79F8A259CA3056F9B131A9 /* MMSnapshotContractTests.swift */; };
 		2C0F7AB93691ED8AA86FBCF0 /* MMProcessDetailInspector.m in Sources */ = {isa = PBXBuildFile; fileRef = 52E641F8A664D456518EDBA4 /* MMProcessDetailInspector.m */; };
 		2E966D96347D1DDB24E18632 /* AlertModels.swift in Sources */ = {isa = PBXBuildFile; fileRef = B657679DB7D1F39AB4911B7B /* AlertModels.swift */; };
 		3BA6709B727B1AAC6C4310B5 /* MMProcessDetailsTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7187632FF63B3B0D07FE9194 /* MMProcessDetailsTests.swift */; };
@@ -167,6 +168,7 @@
 		E4B4E94FB2886C60D5548A2A /* SystemTelemetryStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SystemTelemetryStore.swift; sourceTree = "<group>"; };
 		E6D9BB71DFE7384D0F0E6AA3 /* MMKernelTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMKernelTelemetryProvider.h; sourceTree = "<group>"; };
 		E9DAC4D5C09C974EE833DC7C /* MMDiskIOTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMDiskIOTests.swift; sourceTree = "<group>"; };
+		EA79F8A259CA3056F9B131A9 /* MMSnapshotContractTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMSnapshotContractTests.swift; sourceTree = "<group>"; };
 		F444F4543F0A7421C8F8E636 /* MMKernelTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMKernelTelemetryProvider.m; sourceTree = "<group>"; };
 		F5EC59DCDA5FABDA409CDBCB /* MacMonitor.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = MacMonitor.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		F698B0CC35A89EDEA03F08A5 /* MMDisplayManager.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMDisplayManager.m; sourceTree = "<group>"; };
@@ -438,6 +440,7 @@
 				7187632FF63B3B0D07FE9194 /* MMProcessDetailsTests.swift */,
 				52471E871E5CC1E444318070 /* MMProcessTests.swift */,
 				940D608A1AF80F75584E744E /* MMSMCTests.swift */,
+				EA79F8A259CA3056F9B131A9 /* MMSnapshotContractTests.swift */,
 				78325870C7CD8312AECA2236 /* MMStorageTests.swift */,
 			);
 			path = Tests;
@@ -618,6 +621,7 @@
 				3BA6709B727B1AAC6C4310B5 /* MMProcessDetailsTests.swift in Sources */,
 				7C9AE2ADAED52E593B52F3AE /* MMProcessTests.swift in Sources */,
 				EC9FA3E4A119277B89E73F8D /* MMSMCTests.swift in Sources */,
+				2665E9DAE13C13239857B4BB /* MMSnapshotContractTests.swift in Sources */,
 				1B15F48F6B19E9EA4556ECD5 /* MMStorageTests.swift in Sources */,
 				9BCE74C5454F81EF80492E75 /* MacMonitorTests.swift in Sources */,
 			);
@@ -694,7 +698,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.i3omb.MacMonitor;
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Sources/Bridging/MacMonitor-Bridging-Header.h";
@@ -716,7 +720,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.i3omb.MacMonitorTests;
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Sources/Bridging/MacMonitor-Bridging-Header.h";
@@ -761,7 +765,7 @@
 				CODE_SIGNING_ALLOWED = NO;
 				CODE_SIGN_IDENTITY = "";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 2;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -774,8 +778,8 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
-				MARKETING_VERSION = 0.0.1;
+				MARKETING_VERSION = 0.0.2;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = NO;
@@ -803,7 +807,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.i3omb.MacMonitorTests;
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Sources/Bridging/MacMonitor-Bridging-Header.h";
@@ -848,7 +852,7 @@
 				CODE_SIGNING_ALLOWED = NO;
 				CODE_SIGN_IDENTITY = "";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 1;
+				CURRENT_PROJECT_VERSION = 2;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -867,8 +871,8 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
-				MARKETING_VERSION = 0.0.1;
+				MARKETING_VERSION = 0.0.2;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = NO;
@@ -898,7 +902,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.i3omb.MacMonitor;
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Sources/Bridging/MacMonitor-Bridging-Header.h";

Sources/App/MacMonitorApp.swift

@@ -1,19 +1,67 @@
 import SwiftUI
+import Combine
 
 /// Bridges app-lifecycle events into SwiftUI: requests Notification Center
 /// authorization once at launch so threshold alerts can post banners.
+@MainActor
 final class AppDelegate: NSObject, NSApplicationDelegate {
+    var statusItem: NSStatusItem?
+    var popover: NSPopover?
+    var cancellable: AnyCancellable?
+
     func applicationDidFinishLaunching(_ notification: Notification) {
         if AlertEngine.shared.configuration.alertsEnabled {
             AlertEngine.shared.requestNotificationAuthorization()
         }
+        setupMenuBar()
+    }
+    
+    private func setupMenuBar() {
+        statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
+        
+        let popover = NSPopover()
+        popover.contentSize = NSSize(width: 320, height: 400)
+        popover.behavior = .transient
+        popover.contentViewController = NSHostingController(rootView: QuickGlancePopoverView(store: SystemTelemetryStore.shared))
+        self.popover = popover
+        
+        if let button = statusItem?.button {
+            button.action = #selector(togglePopover(_:))
+            button.target = self
+        }
+        
+        cancellable = SystemTelemetryStore.shared.$latestSnapshot.sink { [weak self] _ in
+            DispatchQueue.main.async {
+                self?.updateMenuBarLabel()
+            }
+        }
+        updateMenuBarLabel()
+    }
+    
+    @objc func togglePopover(_ sender: AnyObject?) {
+        guard let button = statusItem?.button, let popover = popover else { return }
+        if popover.isShown {
+            popover.performClose(sender)
+        } else {
+            popover.show(relativeTo: button.bounds, of: button, preferredEdge: .minY)
+        }
+    }
+    
+    private func updateMenuBarLabel() {
+        guard let button = statusItem?.button else { return }
+        let cpu = SystemTelemetryStore.shared.cpuLoad.totalLoad
+        let mem = SystemTelemetryStore.shared.memory.utilizationPercentage
+        let alerts = AlertEngine.shared.activeAlerts.count
+        
+        let alertStr = alerts > 0 ? "⚠️ " : ""
+        button.title = String(format: "%@CPU: %.0f%% • RAM: %.0f%%", alertStr, cpu, mem)
     }
 }
 
 @main
 struct MacMonitorApp: App {
     @NSApplicationDelegateAdaptor(AppDelegate.self) private var appDelegate
-    @State private var store = SystemTelemetryStore.shared
+    @StateObject private var store = SystemTelemetryStore.shared
 
     var body: some Scene {
         WindowGroup {
@@ -21,21 +69,68 @@ struct MacMonitorApp: App {
         }
         .windowStyle(.titleBar)
         .windowToolbarStyle(.unified)
-        .defaultSize(width: 960, height: 640)
-
-        MenuBarExtra {
-            QuickGlancePopoverView(store: store)
-        } label: {
-            MenuBarStatusView(
-                cpuLoad: store.cpuLoad.totalLoad,
-                memoryPercent: store.memory.utilizationPercentage,
-                activeAlertCount: store.alertEngine.activeAlerts.count
-            )
-        }
-        .menuBarExtraStyle(.window)
 
         Settings {
             AlertsSettingsView()
         }
     }
 }
+
+// MARK: - UI Shims (macOS 12 Support)
+
+public struct MMLabeledContent<Label: View, Content: View>: View {
+    public let label: Label
+    public let content: Content
+
+    public init(@ViewBuilder content: () -> Content, @ViewBuilder label: () -> Label) {
+        self.label = label()
+        self.content = content()
+    }
+
+    public init(_ titleKey: LocalizedStringKey, @ViewBuilder content: () -> Content) where Label == Text {
+        self.label = Text(titleKey)
+        self.content = content()
+    }
+
+    public init<S: StringProtocol>(_ title: S, @ViewBuilder content: () -> Content) where Label == Text {
+        self.label = Text(title)
+        self.content = content()
+    }
+
+    public var body: some View {
+        HStack {
+            label
+            Spacer()
+            content
+        }
+    }
+}
+
+public extension View {
+    @ViewBuilder
+    func mmMonospaced() -> some View {
+        if #available(macOS 13.0, *) {
+            self.monospaced()
+        } else {
+            self
+        }
+    }
+    
+    @ViewBuilder
+    func mmMonospacedDigit() -> some View {
+        if #available(macOS 13.0, *) {
+            self.monospacedDigit()
+        } else {
+            self
+        }
+    }
+    
+    @ViewBuilder
+    func mmFormStyleGrouped() -> some View {
+        if #available(macOS 13.0, *) {
+            self.formStyle(.grouped)
+        } else {
+            self
+        }
+    }
+}

Sources/App/SystemTelemetryStore.swift

@@ -1,6 +1,6 @@
 import Foundation
 import SwiftUI
-import Observation
+import Combine
 
 // MARK: - Typed Telemetry Models
 
@@ -220,39 +220,38 @@ public struct AudioDeviceItem: Identifiable, Sendable {
 
 // MARK: - SystemTelemetryStore
 
-@Observable
 @MainActor
-public final class SystemTelemetryStore {
+public final class SystemTelemetryStore: ObservableObject {
     public static let shared = SystemTelemetryStore()
     
-    public private(set) var isRunning: Bool = false
+    @Published public private(set) var isRunning: Bool = false
-    public private(set) var lastUpdateTimestamp: Date = .now
+    @Published public private(set) var lastUpdateTimestamp: Date = .now
-    public private(set) var sampleInterval: TimeInterval = 1.0
+    @Published public private(set) var sampleInterval: TimeInterval = 1.0
     
     /// Raw snapshots organized by provider identifier
-    public private(set) var latestSnapshot: [String: [String: Any]] = [:]
+    @Published public private(set) var latestSnapshot: [String: [String: Any]] = [:]
     
     /// Milestone 2 Structured Metrics
-    public private(set) var cpuLoad = CPULoadMetrics()
+    @Published public private(set) var cpuLoad = CPULoadMetrics()
-    public private(set) var memory = MemoryMetrics()
+    @Published public private(set) var memory = MemoryMetrics()
-    public private(set) var storageVolumes: [StorageVolumeItem] = []
+    @Published public private(set) var storageVolumes: [StorageVolumeItem] = []
-    public private(set) var cpuThermal = CPUThermalMetrics()
+    @Published public private(set) var cpuThermal = CPUThermalMetrics()
-    public private(set) var fans: [FanTelemetryItem] = []
+    @Published public private(set) var fans: [FanTelemetryItem] = []
-    public private(set) var componentTemps: [ComponentThermalItem] = []
+    @Published public private(set) var componentTemps: [ComponentThermalItem] = []
-    public private(set) var power = PowerMetrics()
+    @Published public private(set) var power = PowerMetrics()
     
     /// Milestone 3 Structured Metrics
-    public private(set) var kernelCounters = KernelCountersMetrics()
+    @Published public private(set) var kernelCounters = KernelCountersMetrics()
-    public private(set) var systemLoad = SystemLoadMetrics()
+    @Published public private(set) var systemLoad = SystemLoadMetrics()
-    public private(set) var diskIO: [DiskIOItem] = []
+    @Published public private(set) var diskIO: [DiskIOItem] = []
-    public private(set) var networkBandwidth: [NetworkBandwidthItem] = []
+    @Published public private(set) var networkBandwidth: [NetworkBandwidthItem] = []
-    public private(set) var networkSockets: [SocketItem] = []
+    @Published public private(set) var networkSockets: [SocketItem] = []
-    public private(set) var processes: [ProcessItem] = []
+    @Published public private(set) var processes: [ProcessItem] = []
-    public private(set) var gpus: [GPUCardItem] = []
+    @Published public private(set) var gpus: [GPUCardItem] = []
-    public private(set) var batteryHealth = BatteryHealthMetrics()
+    @Published public private(set) var batteryHealth = BatteryHealthMetrics()
-    public private(set) var peripherals: [PeripheralDeviceItem] = []
+    @Published public private(set) var peripherals: [PeripheralDeviceItem] = []
-    public private(set) var audioDevices: [AudioDeviceItem] = []
+    @Published public private(set) var audioDevices: [AudioDeviceItem] = []
-    public private(set) var displays: [MMDisplayInfo] = []
+    @Published public private(set) var displays: [MMDisplayInfo] = []
     
     /// Historical Telemetry Store
     public let historyStore = TelemetryHistoryStore.shared
@@ -319,18 +318,18 @@ public final class SystemTelemetryStore {
         }
     }
     
-    private func decodeSnapshot(_ snapshot: [String: [String: Any]]) {
+    func decodeSnapshot(_ snapshot: [String: [String: Any]]) {
         // 1. CPU Load
-        if let cpuDict = snapshot["com.i3omb.macmonitor.telemetry.cpu"] {
+        if let cpuDict = snapshot["com.i3omb.macmonitor.telemetry.cpuload"] {
             var m = CPULoadMetrics()
-            m.systemLoad = (cpuDict["systemLoad"] as? NSNumber)?.doubleValue ?? 0
+            m.systemLoad = (cpuDict["systemPercent"] as? NSNumber)?.doubleValue ?? 0
-            m.userLoad = (cpuDict["userLoad"] as? NSNumber)?.doubleValue ?? 0
+            m.userLoad = (cpuDict["userPercent"] as? NSNumber)?.doubleValue ?? 0
-            m.idleLoad = (cpuDict["idleLoad"] as? NSNumber)?.doubleValue ?? 100
+            m.idleLoad = (cpuDict["idlePercent"] as? NSNumber)?.doubleValue ?? 100
-            m.totalLoad = (cpuDict["totalLoad"] as? NSNumber)?.doubleValue ?? 0
+            m.totalLoad = (cpuDict["totalPercent"] as? NSNumber)?.doubleValue ?? 0
-            if let perCore = cpuDict["perCoreLoad"] as? [NSNumber] {
+            if let cores = cpuDict["cores"] as? [[String: Any]] {
-                m.perCoreLoad = perCore.map { $0.doubleValue }
+                m.perCoreLoad = cores.map { ($0["totalPercent"] as? NSNumber)?.doubleValue ?? 0 }
             }
-            m.cpuFrequencyMHz = (cpuDict["cpuFrequencyMHz"] as? NSNumber)?.doubleValue ?? 0
+            m.cpuFrequencyMHz = ((cpuDict["frequencyHz"] as? NSNumber)?.doubleValue ?? 0) / 1e6
             m.isThrottled = (cpuDict["isThrottled"] as? NSNumber)?.boolValue ?? false
             self.cpuLoad = m
         }
@@ -347,7 +346,8 @@ public final class SystemTelemetryStore {
             m.compressedBytes = (memDict["compressedBytes"] as? NSNumber)?.uint64Value ?? 0
             m.swapTotalBytes = (memDict["swapTotalBytes"] as? NSNumber)?.uint64Value ?? 0
             m.swapUsedBytes = (memDict["swapUsedBytes"] as? NSNumber)?.uint64Value ?? 0
-            m.utilizationPercentage = (memDict["utilizationPercentage"] as? NSNumber)?.doubleValue ?? 0
+            m.utilizationPercentage = m.totalBytes > 0
+                ? Double(m.usedBytes) / Double(m.totalBytes) * 100.0 : 0
             m.pressureLevel = memDict["memoryPressureStatus"] as? String
                 ?? memDict["pressureLevel"] as? String ?? "Normal"
             self.memory = m
@@ -361,11 +361,11 @@ public final class SystemTelemetryStore {
                 return StorageVolumeItem(
                     mountPoint: mount,
                     volumeName: dict["volumeName"] as? String ?? mount,
-                    fileSystem: dict["fileSystem"] as? String ?? "APFS",
+                    fileSystem: dict["fsType"] as? String ?? "APFS",
                     totalBytes: (dict["totalBytes"] as? NSNumber)?.uint64Value ?? 0,
                     freeBytes: (dict["freeBytes"] as? NSNumber)?.uint64Value ?? 0,
                     usedBytes: (dict["usedBytes"] as? NSNumber)?.uint64Value ?? 0,
-                    usedPercentage: (dict["usedPercentage"] as? NSNumber)?.doubleValue ?? 0,
+                    usedPercentage: (dict["usedPercent"] as? NSNumber)?.doubleValue ?? 0,
                     isReadOnly: (dict["isReadOnly"] as? NSNumber)?.boolValue ?? false
                 )
             }
@@ -394,7 +394,7 @@ public final class SystemTelemetryStore {
         if let fanDict = snapshot["com.i3omb.macmonitor.telemetry.fan"],
            let fanArray = fanDict["fans"] as? [[String: Any]] {
             self.fans = fanArray.compactMap { d in
-                let idx = (d["index"] as? NSNumber)?.intValue ?? 0
+                let idx = (d["fanIndex"] as? NSNumber)?.intValue ?? 0
                 return FanTelemetryItem(
                     index: idx,
                     name: d["name"] as? String ?? "Fan \(idx + 1)",
@@ -402,7 +402,7 @@ public final class SystemTelemetryStore {
                     minRPM: (d["minRPM"] as? NSNumber)?.doubleValue ?? 0,
                     maxRPM: (d["maxRPM"] as? NSNumber)?.doubleValue ?? 0,
                     targetRPM: (d["targetRPM"] as? NSNumber)?.doubleValue ?? 0,
-                    utilization: (d["utilization"] as? NSNumber)?.doubleValue ?? 0
+                    utilization: (d["utilizationPercent"] as? NSNumber)?.doubleValue ?? 0
                 )
             }
         }
@@ -446,27 +446,27 @@ public final class SystemTelemetryStore {
         }
         
         // 8. Kernel Counters
-        if let kDict = snapshot["com.i3omb.macmonitor.telemetry.kernel"] {
+        if let kDict = snapshot["com.i3omb.macmonitor.telemetry.kernel.counters"] {
             var m = KernelCountersMetrics()
-            m.contextSwitchesPerSec = (kDict["contextSwitchesPerSec"] as? NSNumber)?.doubleValue ?? 0
+            m.contextSwitchesPerSec = (kDict["contextSwitchesRate"] as? NSNumber)?.doubleValue ?? 0
-            m.syscallsPerSec = (kDict["syscallsPerSec"] as? NSNumber)?.doubleValue ?? 0
+            m.syscallsPerSec = (kDict["syscallsRate"] as? NSNumber)?.doubleValue ?? 0
-            m.pageFaultsPerSec = (kDict["pageFaultsPerSec"] as? NSNumber)?.doubleValue ?? 0
+            m.pageFaultsPerSec = (kDict["pageFaultsRate"] as? NSNumber)?.doubleValue ?? 0
-            m.cowFaultsPerSec = (kDict["cowFaultsPerSec"] as? NSNumber)?.doubleValue ?? 0
+            m.cowFaultsPerSec = (kDict["cowFaultsRate"] as? NSNumber)?.doubleValue ?? 0
-            m.zeroFillFaultsPerSec = (kDict["zeroFillFaultsPerSec"] as? NSNumber)?.doubleValue ?? 0
+            m.zeroFillFaultsPerSec = (kDict["zeroFillsRate"] as? NSNumber)?.doubleValue ?? 0
-            m.pageinsPerSec = (kDict["pageinsPerSec"] as? NSNumber)?.doubleValue ?? 0
+            m.pageinsPerSec = (kDict["pageinsRate"] as? NSNumber)?.doubleValue ?? 0
-            m.pageoutsPerSec = (kDict["pageoutsPerSec"] as? NSNumber)?.doubleValue ?? 0
+            m.pageoutsPerSec = (kDict["pageoutsRate"] as? NSNumber)?.doubleValue ?? 0
-            m.totalContextSwitches = (kDict["totalContextSwitches"] as? NSNumber)?.uint64Value ?? 0
+            m.totalContextSwitches = (kDict["cumulative_contextSwitches"] as? NSNumber)?.uint64Value ?? 0
-            m.totalSyscalls = (kDict["totalSyscalls"] as? NSNumber)?.uint64Value ?? 0
+            m.totalSyscalls = (kDict["cumulative_syscalls"] as? NSNumber)?.uint64Value ?? 0
-            m.totalPageFaults = (kDict["totalPageFaults"] as? NSNumber)?.uint64Value ?? 0
+            m.totalPageFaults = (kDict["cumulative_pageFaults"] as? NSNumber)?.uint64Value ?? 0
             self.kernelCounters = m
         }
         
         // 9. System Load Average & Mach Factor
-        if let loadDict = snapshot["com.i3omb.macmonitor.telemetry.systemload"] {
+        if let loadDict = snapshot["com.i3omb.macmonitor.telemetry.system.load"] {
             var m = SystemLoadMetrics()
-            m.load1Min = (loadDict["load1Min"] as? NSNumber)?.doubleValue ?? 0
+            m.load1Min = (loadDict["load1m"] as? NSNumber)?.doubleValue ?? 0
-            m.load5Min = (loadDict["load5Min"] as? NSNumber)?.doubleValue ?? 0
+            m.load5Min = (loadDict["load5m"] as? NSNumber)?.doubleValue ?? 0
-            m.load15Min = (loadDict["load15Min"] as? NSNumber)?.doubleValue ?? 0
+            m.load15Min = (loadDict["load15m"] as? NSNumber)?.doubleValue ?? 0
             m.taskCount = (loadDict["taskCount"] as? NSNumber)?.intValue ?? 0
             m.threadCount = (loadDict["threadCount"] as? NSNumber)?.intValue ?? 0
             m.machFactor = (loadDict["machFactor"] as? NSNumber)?.doubleValue ?? 0
@@ -474,18 +474,18 @@ public final class SystemTelemetryStore {
         }
         
         // 10. Disk I/O & IOPS
-        if let diskDict = snapshot["com.i3omb.macmonitor.telemetry.diskio"],
+        if let diskDict = snapshot["com.i3omb.macmonitor.telemetry.storage.io"],
            let disks = diskDict["disks"] as? [[String: Any]] {
             self.diskIO = disks.compactMap { d in
                 guard let bsd = d["bsdName"] as? String else { return nil }
                 return DiskIOItem(
                     bsdName: bsd,
-                    readBps: (d["readBps"] as? NSNumber)?.doubleValue ?? 0,
+                    readBps: (d["readBytesPerSec"] as? NSNumber)?.doubleValue ?? 0,
-                    writeBps: (d["writeBps"] as? NSNumber)?.doubleValue ?? 0,
+                    writeBps: (d["writeBytesPerSec"] as? NSNumber)?.doubleValue ?? 0,
                     readIOPS: (d["readIOPS"] as? NSNumber)?.doubleValue ?? 0,
                     writeIOPS: (d["writeIOPS"] as? NSNumber)?.doubleValue ?? 0,
-                    totalBytesRead: (d["totalBytesRead"] as? NSNumber)?.uint64Value ?? 0,
+                    totalBytesRead: (d["cumulativeReadBytes"] as? NSNumber)?.uint64Value ?? 0,
-                    totalBytesWritten: (d["totalBytesWritten"] as? NSNumber)?.uint64Value ?? 0
+                    totalBytesWritten: (d["cumulativeWriteBytes"] as? NSNumber)?.uint64Value ?? 0
                 )
             }
         }
@@ -494,17 +494,17 @@ public final class SystemTelemetryStore {
         if let netDict = snapshot["com.i3omb.macmonitor.telemetry.network.bandwidth"],
            let ifaces = netDict["interfaces"] as? [[String: Any]] {
             self.networkBandwidth = ifaces.compactMap { d in
-                guard let name = d["interfaceName"] as? String else { return nil }
+                guard let name = d["name"] as? String else { return nil }
                 return NetworkBandwidthItem(
                     interfaceName: name,
-                    ipAddress: d["ipAddress"] as? String ?? "",
+                    ipAddress: d["ipv4Address"] as? String ?? "",
                     isUp: (d["isUp"] as? NSNumber)?.boolValue ?? false,
-                    downloadBps: (d["downloadBps"] as? NSNumber)?.doubleValue ?? 0,
+                    downloadBps: (d["downloadBytesPerSec"] as? NSNumber)?.doubleValue ?? 0,
-                    uploadBps: (d["uploadBps"] as? NSNumber)?.doubleValue ?? 0,
+                    uploadBps: (d["uploadBytesPerSec"] as? NSNumber)?.doubleValue ?? 0,
-                    downloadPps: (d["downloadPps"] as? NSNumber)?.doubleValue ?? 0,
+                    downloadPps: (d["downloadPacketsPerSec"] as? NSNumber)?.doubleValue ?? 0,
-                    uploadPps: (d["uploadPps"] as? NSNumber)?.doubleValue ?? 0,
+                    uploadPps: (d["uploadPacketsPerSec"] as? NSNumber)?.doubleValue ?? 0,
-                    totalBytesIn: (d["totalBytesIn"] as? NSNumber)?.uint64Value ?? 0,
+                    totalBytesIn: (d["cumulativeInBytes"] as? NSNumber)?.uint64Value ?? 0,
-                    totalBytesOut: (d["totalBytesOut"] as? NSNumber)?.uint64Value ?? 0
+                    totalBytesOut: (d["cumulativeOutBytes"] as? NSNumber)?.uint64Value ?? 0
                 )
             }
         }
@@ -539,8 +539,8 @@ public final class SystemTelemetryStore {
                     ppid: (d["ppid"] as? NSNumber)?.int32Value ?? 0,
                     name: d["name"] as? String ?? "Unknown",
                     cpuPercent: (d["cpuPercent"] as? NSNumber)?.doubleValue ?? 0,
-                    residentSize: (d["residentSize"] as? NSNumber)?.uint64Value ?? 0,
+                    residentSize: (d["residentBytes"] as? NSNumber)?.uint64Value ?? 0,
-                    virtualSize: (d["virtualSize"] as? NSNumber)?.uint64Value ?? 0,
+                    virtualSize: (d["virtualBytes"] as? NSNumber)?.uint64Value ?? 0,
                     threadCount: (d["threadCount"] as? NSNumber)?.int32Value ?? 1,
                     uid: (d["uid"] as? NSNumber)?.uint32Value ?? 0,
                     username: d["username"] as? String ?? "",
@@ -701,10 +701,14 @@ public final class SystemTelemetryStore {
                 freeBytes: $0.freeBytes,
                 freePercent: $0.totalBytes > 0
                     ? Double($0.freeBytes) / Double($0.totalBytes) * 100.0
-                    : 0
+                    : 0,
+                totalBytes: $0.totalBytes,
+                isReadOnly: $0.isReadOnly
             )
         }
-        context.batteryLevel = self.power.batteryLevel
+        context.batteryLevel = self.batteryHealth.maxCapacity > 0
+            ? Double(self.batteryHealth.currentCapacity) / Double(self.batteryHealth.maxCapacity) * 100.0
+            : self.power.batteryLevel
         context.hasBattery = self.batteryHealth.hasBattery
         context.onExternalPower = self.batteryHealth.externalConnected
         context.isCharging = self.batteryHealth.isCharging || self.power.isCharging

Sources/Hardware/AppleSMC/MMAppleSMCClient.m

@@ -57,13 +57,13 @@
         return YES;
     }
     
-    CFMutableDictionaryRef matching = IOServiceMatching("AppleSMCClient");
+    CFMutableDictionaryRef matching = IOServiceMatching("AppleSMC");
     if (!matching) {
         os_unfair_lock_unlock(&_lock);
         if (error) {
             *error = [NSError errorWithDomain:@"com.i3omb.MacMonitor.SMC"
                                          code:-1
-                                     userInfo:@{NSLocalizedDescriptionKey: @"Failed to create AppleSMCClient matching dictionary"}];
+                                     userInfo:@{NSLocalizedDescriptionKey: @"Failed to create AppleSMC matching dictionary"}];
         }
         return NO;
     }
@@ -74,7 +74,7 @@
         if (error) {
             *error = [NSError errorWithDomain:@"com.i3omb.MacMonitor.SMC"
                                          code:-2
-                                     userInfo:@{NSLocalizedDescriptionKey: @"AppleSMCClient service not found (running on non-Mac or unsupported VM)"}];
+                                     userInfo:@{NSLocalizedDescriptionKey: @"AppleSMC service not found (running on non-Mac or unsupported VM)"}];
         }
         return NO;
     }

Sources/Hardware/AppleSMC/MMSMCDefines.h

@@ -15,8 +15,6 @@
 #define kSMCGetKeyFromIndex 8
 #define kSMCGetKeyInfo      9
 
-#pragma pack(push, 1)
-
 typedef struct {
     unsigned char major;
     unsigned char minor;
@@ -58,8 +56,6 @@ typedef struct {
     UInt8 bytes[32];
 } SMCVal_t;
 
-#pragma pack(pop)
-
 static inline UInt32 MMSMCToFourCharCode(const char * _Nonnull str) {
     UInt32 code = 0;
     for (int i = 0; i < 4 && str[i] != '\0'; i++) {

Sources/History/TelemetryHistoryStore.swift

@@ -1,5 +1,6 @@
 import Foundation
 import SwiftUI
+import Combine
 
 public struct TelemetrySnapshotRecord {
     public let cpuLoad: Double
@@ -35,8 +36,7 @@ public struct TelemetrySnapshotRecord {
     }
 }
 
-@Observable
+public final class TelemetryHistoryStore: ObservableObject {
-public final class TelemetryHistoryStore {
     public static let shared = TelemetryHistoryStore()
     
     public let cpuHistory = RollingRingBuffer<Double>(capacity: 60)
@@ -48,7 +48,7 @@ public final class TelemetryHistoryStore {
     public let cpuTempHistory = RollingRingBuffer<Double>(capacity: 60)
     public let powerHistory = RollingRingBuffer<Double>(capacity: 60)
     
-    public private(set) var sampleCounter: UInt64 = 0
+    @Published public private(set) var sampleCounter: UInt64 = 0
     
     public init() {}
     

Sources/Intelligence/AlertEngine.swift

@@ -1,5 +1,6 @@
 import Foundation
 import UserNotifications
+import Combine
 
 // MARK: - Alert Engine
 
@@ -13,18 +14,17 @@ import UserNotifications
 ///   persistent   -> re-fire only after `cooldownMinutes` elapse
 ///   recovery     -> remove from active set, log `.resolved`, clear cooldown so
 ///                   the next breach alerts immediately
-@Observable
 @MainActor
-public final class AlertEngine {
+public final class AlertEngine: ObservableObject {
     public static let shared = AlertEngine()
 
     /// Currently breached conditions, refreshed every evaluation pass.
-    public private(set) var activeAlerts: [SystemAlert] = []
+    @Published public private(set) var activeAlerts: [SystemAlert] = []
     /// Newest-first audit log of trigger/resolve events (capped).
-    public private(set) var history: [AlertEvent] = []
+    @Published public private(set) var history: [AlertEvent] = []
 
     /// Threshold settings. Mutations are persisted immediately.
-    public var configuration: AlertConfiguration {
+    @Published public var configuration: AlertConfiguration {
         didSet { configuration.save(to: defaults) }
     }
 
@@ -163,7 +163,10 @@ public final class AlertEngine {
 
         // 4. Low storage space (per mounted volume)
         if cfg.storageEnabled {
-            for volume in ctx.volumes {
+            // Skip read-only mounts (DMGs, snapshots) and trivially small
+            // volumes where free-space thresholds are meaningless.
+            let minTotalBytes: UInt64 = 1_073_741_824 // 1 GB
+            for volume in ctx.volumes where !volume.isReadOnly && volume.totalBytes >= minTotalBytes {
                 let freeGB = Double(volume.freeBytes) / (1024 * 1024 * 1024)
                 if freeGB < cfg.storageFreeGBThreshold || volume.freePercent < cfg.storageFreePercentThreshold {
                     alerts.append(SystemAlert(

Sources/Intelligence/AlertModels.swift

@@ -70,12 +70,18 @@ public struct StorageVolumeContext: Equatable, Sendable {
     public let volumeName: String
     public let freeBytes: UInt64
     public let freePercent: Double
+    public let totalBytes: UInt64
+    /// Read-only mounts (DMG images, snapshots) are excluded from alerting.
+    public let isReadOnly: Bool
 
-    public init(mountPoint: String, volumeName: String, freeBytes: UInt64, freePercent: Double) {
+    public init(mountPoint: String, volumeName: String, freeBytes: UInt64, freePercent: Double,
+                totalBytes: UInt64 = 0, isReadOnly: Bool = false) {
         self.mountPoint = mountPoint
         self.volumeName = volumeName
         self.freeBytes = freeBytes
         self.freePercent = freePercent
+        self.totalBytes = totalBytes
+        self.isReadOnly = isReadOnly
     }
 }
 

Sources/Intelligence/AlertNotificationDispatcher.swift

@@ -1,20 +1,20 @@
 import Foundation
 import UserNotifications
+import Combine
 
 // MARK: - Navigation Bus
 
 /// Lightweight bus letting notification action handlers steer the main window:
 /// tapping a notification (or its "View Processes" action) activates the app and
 /// selects the requested sidebar tab inside `ContentView`.
-@Observable
+public final class AppNavigationBus: ObservableObject {
-public final class AppNavigationBus {
     public static let shared = AppNavigationBus()
 
     /// Sidebar tag the main window should switch to (e.g. `"Processes"`).
     /// `nil` means "just bring the window forward".
-    public private(set) var requestedTab: String?
+    @Published public private(set) var requestedTab: String?
     /// Monotonic counter so repeated taps on the same tab still trigger `onChange`.
-    public private(set) var requestCounter: Int = 0
+    @Published public private(set) var requestCounter: Int = 0
 
     private init() {}
 
@@ -118,11 +118,12 @@ public final class UNAlertNotificationDispatcher: NSObject, AlertNotificationDis
         didReceive response: UNNotificationResponse,
         withCompletionHandler completionHandler: @escaping () -> Void
     ) {
-        let targetTab: String? = switch response.actionIdentifier {
+        let targetTab: String?
+        switch response.actionIdentifier {
         case AlertNotificationAction.viewProcessesIdentifier:
-            "Processes"
+            targetTab = "Processes"
         default:
-            nil
+            targetTab = nil
         }
         Task { @MainActor in
             AppNavigationBus.shared.request(tab: targetTab)

Sources/Telemetry/Fan/MMFanTelemetryProvider.h

@@ -22,7 +22,7 @@ NS_ASSUME_NONNULL_BEGIN
 /**
  * Static calculator method for deterministic unit testing.
  */
-+ (NSDictionary<NSString *, id> *)calculateFanMetricsFromFanList:(NSArray<NSDictionary<NSString *, NSNumber *> *> *)fanList;
++ (NSDictionary<NSString *, id> *)calculateFanMetricsFromFanList:(NSArray<NSDictionary<NSString *, id> *> *)fanList;
 
 @end
 

Sources/Telemetry/Fan/MMFanTelemetryProvider.m

@@ -63,7 +63,7 @@
     return (_probedFanCount >= 0) ? _probedFanCount : 0;
 }
 
-+ (NSDictionary<NSString *, id> *)calculateFanMetricsFromFanList:(NSArray<NSDictionary<NSString *, NSNumber *> *> *)fanList {
++ (NSDictionary<NSString *, id> *)calculateFanMetricsFromFanList:(NSArray<NSDictionary<NSString *, id> *> *)fanList {
     if (!fanList || fanList.count == 0) {
         return @{
             @"fanCount": @(0),
@@ -78,7 +78,7 @@
     double peakRPM = 0.0;
     
     for (NSUInteger i = 0; i < fanList.count; i++) {
-        NSDictionary<NSString *, NSNumber *> *raw = fanList[i];
+        NSDictionary<NSString *, id> *raw = fanList[i];
         double current = [raw[@"currentRPM"] doubleValue];
         double min = [raw[@"minRPM"] doubleValue];
         double max = [raw[@"maxRPM"] doubleValue];
@@ -96,6 +96,7 @@
         
         [resultList addObject:@{
             @"fanIndex": @(i),
+            @"name": raw[@"name"] ?: [NSString stringWithFormat:@"Fan %lu", (unsigned long)(i + 1)],
             @"currentRPM": @(current),
             @"minRPM": @(min),
             @"maxRPM": @(max),
@@ -120,20 +121,31 @@
     }
     
     NSInteger count = [self fanCount];
-    NSMutableArray<NSDictionary<NSString *, NSNumber *> *> *rawList = [NSMutableArray arrayWithCapacity:count];
+    NSMutableArray<NSDictionary<NSString *, id> *> *rawList = [NSMutableArray arrayWithCapacity:count];
     
     for (NSInteger i = 0; i < count; i++) {
         NSString *acKey = [NSString stringWithFormat:@"F%ldAc", (long)i];
         NSString *mnKey = [NSString stringWithFormat:@"F%ldMn", (long)i];
         NSString *mxKey = [NSString stringWithFormat:@"F%ldMx", (long)i];
         NSString *tgKey = [NSString stringWithFormat:@"F%ldTg", (long)i];
+        NSString *idKey = [NSString stringWithFormat:@"F%ldID", (long)i];
         
         NSNumber *ac = [_smcClient readNumericValueForKey:acKey error:nil] ?: @(0.0);
         NSNumber *mn = [_smcClient readNumericValueForKey:mnKey error:nil] ?: @(0.0);
         NSNumber *mx = [_smcClient readNumericValueForKey:mxKey error:nil] ?: @(6000.0);
         NSNumber *tg = [_smcClient readNumericValueForKey:tgKey error:nil] ?: ac;
         
+        NSString *fanName = [NSString stringWithFormat:@"Fan %ld", (long)(i + 1)];
+        NSData *idData = [_smcClient readBytesForKey:idKey error:nil];
+        if (idData.length > 0) {
+            NSString *raw = [[NSString alloc] initWithData:idData encoding:NSASCIIStringEncoding];
+            NSString *trimmed = [raw stringByTrimmingCharactersInSet:
+                                 [NSCharacterSet characterSetWithCharactersInString:@"\0 "]];
+            if (trimmed.length > 0) fanName = trimmed;
+        }
+        
         [rawList addObject:@{
+            @"name": fanName,
             @"currentRPM": ac,
             @"minRPM": mn,
             @"maxRPM": mx,

Sources/Telemetry/Network/MMNetworkBandwidthProvider.h

@@ -21,7 +21,8 @@ NS_ASSUME_NONNULL_BEGIN
 + (NSDictionary<NSString *, id> *)calculateBandwidthMetricsWithCurrentSnapshots:(NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)current
                                                               previousSnapshots:(nullable NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)previous
                                                                       timeDelta:(NSTimeInterval)timeDelta
-                                                                    ipAddresses:(nullable NSDictionary<NSString *, NSString *> *)ipAddresses;
+                                                                    ipAddresses:(nullable NSDictionary<NSString *, NSString *> *)ipAddresses
+                                                                interfaceUpFlags:(nullable NSDictionary<NSString *, NSNumber *> *)interfaceUpFlags;
 
 @end
 

Sources/Telemetry/Network/MMNetworkBandwidthProvider.m

@@ -44,7 +44,8 @@
 + (NSDictionary<NSString *, id> *)calculateBandwidthMetricsWithCurrentSnapshots:(NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)current
                                                               previousSnapshots:(nullable NSDictionary<NSString *, NSDictionary<NSString *, NSNumber *> *> *)previous
                                                                       timeDelta:(NSTimeInterval)timeDelta
-                                                                    ipAddresses:(nullable NSDictionary<NSString *, NSString *> *)ipAddresses {
+                                                                    ipAddresses:(nullable NSDictionary<NSString *, NSString *> *)ipAddresses
+                                                                interfaceUpFlags:(nullable NSDictionary<NSString *, NSNumber *> *)interfaceUpFlags {
     double totalDownBps = 0.0;
     double totalUpBps = 0.0;
     double totalDownPps = 0.0;
@@ -99,9 +100,11 @@
         }
         
         NSString *ip = ipAddresses[name] ?: @"";
+        BOOL isUp = interfaceUpFlags[name] ? [interfaceUpFlags[name] boolValue] : NO;
         
         [interfaces addObject:@{
             @"name": name,
+            @"isUp": @(isUp),
             @"downloadBytesPerSec": @(downBps),
             @"uploadBytesPerSec": @(upBps),
             @"downloadPacketsPerSec": @(downPps),
@@ -171,16 +174,18 @@
         if (buf) free(buf);
     }
     
-    // 2. Query IPv4 addresses via getifaddrs
+    // 2. Query IPv4 addresses and interface flags via getifaddrs
     NSMutableDictionary<NSString *, NSString *> *ipDict = [NSMutableDictionary dictionary];
+    NSMutableDictionary<NSString *, NSNumber *> *upDict = [NSMutableDictionary dictionary];
     struct ifaddrs *ifap = NULL;
     if (getifaddrs(&ifap) == 0) {
         for (struct ifaddrs *ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
+            NSString *name = [NSString stringWithUTF8String:ifa->ifa_name];
+            upDict[name] = @((ifa->ifa_flags & IFF_UP) != 0);
             if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
                 char ipBuf[INET_ADDRSTRLEN] = {0};
                 struct sockaddr_in *sin = (struct sockaddr_in *)ifa->ifa_addr;
                 if (inet_ntop(AF_INET, &sin->sin_addr, ipBuf, sizeof(ipBuf))) {
-                    NSString *name = [NSString stringWithUTF8String:ifa->ifa_name];
                     ipDict[name] = [NSString stringWithUTF8String:ipBuf];
                 }
             }
@@ -205,7 +210,8 @@
     return [MMNetworkBandwidthProvider calculateBandwidthMetricsWithCurrentSnapshots:currentSnapshots
                                                                    previousSnapshots:prev
                                                                            timeDelta:timeDelta
-                                                                         ipAddresses:ipDict];
+                                                                         ipAddresses:ipDict
+                                                                    interfaceUpFlags:upDict];
 }
 
 @end

Sources/Telemetry/Process/MMProcessTelemetryProvider.m

@@ -1,6 +1,7 @@
 #import "MMProcessTelemetryProvider.h"
 #import <libproc.h>
 #import <sys/proc_info.h>
+#import <sys/proc.h>
 #import <pwd.h>
 #import <signal.h>
 #import <mach/mach_time.h>
@@ -127,7 +128,9 @@
             @"residentBytes": @(tai.ptinfo.pti_resident_size),
             @"virtualBytes": @(tai.ptinfo.pti_virtual_size),
             @"threadCount": @(tai.ptinfo.pti_threadnum),
-            @"runningThreads": @(tai.ptinfo.pti_numrunning)
+            @"runningThreads": @(tai.ptinfo.pti_numrunning),
+            @"isStopped": @(tai.pbsd.pbi_status == SSTOP),
+            @"isZombie": @(tai.pbsd.pbi_status == SZOMB)
         }];
     }
     

Sources/UI/Alerts/AlertsView.swift

@@ -4,8 +4,9 @@ import SwiftUI
 
 /// Sidebar tab showing currently breached thresholds and the in-app
 /// alert history log maintained by `AlertEngine`.
+@MainActor
 public struct AlertsView: View {
-    @State private var engine = AlertEngine.shared
+    @ObservedObject private var engine = AlertEngine.shared
 
     public init() {}
 
@@ -109,7 +110,7 @@ public struct AlertsView: View {
                             Text(event.alertID)
                                 .font(.caption2)
                                 .foregroundStyle(.secondary)
-                                .monospaced()
+                                .mmMonospaced()
                         }
                         Spacer()
                         Text(event.timestamp.formatted(date: .abbreviated, time: .standard))

Sources/UI/Charts/TelemetryTrendChartView.swift

@@ -1,5 +1,7 @@
 import SwiftUI
+#if canImport(Charts)
 import Charts
+#endif
 
 public struct TelemetryTrendChartView: View {
     public let title: String
@@ -43,8 +45,7 @@ public struct TelemetryTrendChartView: View {
                 Spacer()
                 HStack(spacing: 12) {
                     Text(String(format: "Cur: %.1f %@", currentValue, unit))
-                        .font(.caption)
+                        .font(.system(size: 11, weight: .semibold))
-                        .fontWeight(.semibold)
                         .foregroundColor(color)
                     Text(String(format: "Avg: %.1f %@", averageValue, unit))
                         .font(.caption)
@@ -55,35 +56,78 @@ public struct TelemetryTrendChartView: View {
                 }
             }
             
-            Chart {
+            #if canImport(Charts)
-                ForEach(Array(samples.enumerated()), id: \.element.id) { index, sample in
+            if #available(macOS 13.0, *) {
-                    LineMark(
+                Chart {
-                        x: .value("Sample", index),
+                    ForEach(Array(samples.enumerated()), id: \.element.id) { index, sample in
-                        y: .value("Value", sample.value)
+                        LineMark(
-                    )
+                            x: .value("Sample", index),
-                    .interpolationMethod(.monotone)
+                            y: .value("Value", sample.value)
-                    .foregroundStyle(color)
-                    
-                    AreaMark(
-                        x: .value("Sample", index),
-                        y: .value("Value", sample.value)
-                    )
-                    .interpolationMethod(.monotone)
-                    .foregroundStyle(
-                        LinearGradient(
-                            colors: [color.opacity(0.35), color.opacity(0.05)],
-                            startPoint: .top,
-                            endPoint: .bottom
                         )
-                    )
+                        .interpolationMethod(.monotone)
+                        .foregroundStyle(color)
+                        
+                        AreaMark(
+                            x: .value("Sample", index),
+                            y: .value("Value", sample.value)
+                        )
+                        .interpolationMethod(.monotone)
+                        .foregroundStyle(
+                            LinearGradient(
+                                colors: [color.opacity(0.35), color.opacity(0.05)],
+                                startPoint: .top,
+                                endPoint: .bottom
+                            )
+                        )
+                    }
                 }
+                .chartYScale(domain: 0...(maxY ?? max(1.0, maxValue * 1.15)))
+                .chartXAxis(.hidden)
+                .frame(height: 120)
+            } else {
+                fallbackChart
             }
-            .chartYScale(domain: 0...(maxY ?? max(1.0, maxValue * 1.15)))
+            #else
-            .chartXAxis(.hidden)
+            fallbackChart
-            .frame(height: 120)
+            #endif
         }
         .padding(14)
         .background(Color(NSColor.controlBackgroundColor))
         .cornerRadius(10)
     }
+
+    @ViewBuilder
+    private var fallbackChart: some View {
+        Canvas { context, size in
+            guard samples.count > 1 else { return }
+            let effectiveMaxY = maxY ?? max(1.0, maxValue * 1.15)
+            let dx = size.width / CGFloat(samples.count - 1)
+            var path = Path()
+            var areaPath = Path()
+            
+            for (index, sample) in samples.enumerated() {
+                let x = CGFloat(index) * dx
+                let y = size.height - (CGFloat(sample.value) / CGFloat(effectiveMaxY)) * size.height
+                
+                if index == 0 {
+                    path.move(to: CGPoint(x: x, y: y))
+                    areaPath.move(to: CGPoint(x: x, y: size.height))
+                    areaPath.addLine(to: CGPoint(x: x, y: y))
+                } else {
+                    path.addLine(to: CGPoint(x: x, y: y))
+                    areaPath.addLine(to: CGPoint(x: x, y: y))
+                }
+            }
+            
+            if let lastIndex = samples.indices.last {
+                let lastX = CGFloat(lastIndex) * dx
+                areaPath.addLine(to: CGPoint(x: lastX, y: size.height))
+                areaPath.closeSubpath()
+            }
+            
+            context.fill(areaPath, with: .linearGradient(Gradient(colors: [color.opacity(0.35), color.opacity(0.05)]), startPoint: .zero, endPoint: CGPoint(x: 0, y: size.height)))
+            context.stroke(path, with: .color(color), lineWidth: 2)
+        }
+        .frame(height: 120)
+    }
 }

Sources/UI/ContentView.swift

@@ -1,20 +1,20 @@
 import SwiftUI
 
+@MainActor
 public struct ContentView: View {
-    @State private var store = SystemTelemetryStore.shared
+    @StateObject private var store = SystemTelemetryStore.shared
-    @State private var selectedTab: String = "Dashboard"
+    @State private var selectedTab: String? = "Dashboard"
     @State private var processSearchText: String = ""
     @State private var socketSearchText: String = ""
     @State private var selectedPID: Int32? = nil
     @State private var showingProcessDetail: Bool = false
-    @State private var navBus = AppNavigationBus.shared
+    @StateObject private var navBus = AppNavigationBus.shared
     
     public init() {}
     
     public var body: some View {
-        NavigationSplitView {
+        NavigationView {
             sidebarContent
-        } detail: {
             detailContent
         }
         .frame(minWidth: 1000, minHeight: 700)
@@ -26,7 +26,7 @@ public struct ContentView: View {
                 ProcessDetailSheet(inspector: store.processInspector, pid: pid)
             }
         }
-        .onChange(of: navBus.requestCounter) { _, _ in
+        .onChange(of: navBus.requestCounter) { _ in
             NSApp.activate(ignoringOtherApps: true)
             if let window = NSApp.windows.first(where: { $0.canBecomeMain }) {
                 window.makeKeyAndOrderFront(nil)
@@ -87,13 +87,29 @@ public struct ContentView: View {
             }
             
             Section("Intelligence") {
-                Label("Alerts & Notifications", systemImage: "bell.badge")
+                // Custom row instead of .badge() — a badge applied after .tag
-                    .tag("Alerts")
+                // detaches the tag from the list row and makes it unselectable.
-                    .badge(store.alertEngine.activeAlerts.isEmpty ? nil : Text("\(store.alertEngine.activeAlerts.count)"))
+                Label {
+                    HStack {
+                        Text("Alerts & Notifications")
+                        Spacer()
+                        if !store.alertEngine.activeAlerts.isEmpty {
+                            Text("\(store.alertEngine.activeAlerts.count)")
+                                .font(.caption2.weight(.semibold))
+                                .padding(.horizontal, 6)
+                                .padding(.vertical, 2)
+                                .background(Color.red.opacity(0.85), in: Capsule())
+                                .foregroundStyle(.white)
+                        }
+                    }
+                } icon: {
+                    Image(systemName: "bell.badge")
+                }
+                .tag("Alerts")
             }
         }
         .listStyle(.sidebar)
-        .navigationSplitViewColumnWidth(min: 210, ideal: 240, max: 300)
+        .frame(minWidth: 210, idealWidth: 240, maxWidth: 300)
     }
     
     // MARK: - Detail Content Router
@@ -104,7 +120,7 @@ public struct ContentView: View {
                 headerCard
                 engineControlCard
                 
-                switch selectedTab {
+                switch selectedTab ?? "Dashboard" {
                 case "Dashboard":
                     dashboardView
                 case "Architecture":
@@ -153,7 +169,7 @@ public struct ContentView: View {
             }
             .padding(24)
         }
-        .navigationTitle("MacMonitor — \(selectedTab)")
+        .navigationTitle("MacMonitor — \(selectedTab ?? "Dashboard")")
     }
     
     // MARK: - Dashboard Composite View
@@ -342,20 +358,20 @@ public struct ContentView: View {
             Label("Kernel & VM Telemetry", systemImage: "waveform.path.ecg")
                 .font(.headline)
             
-            Grid(alignment: .leading, horizontalSpacing: 20, verticalSpacing: 8) {
+            VStack(alignment: .leading, spacing: 8) {
-                GridRow {
+                HStack {
                     Text("Context Switches:").foregroundStyle(.secondary)
                     Text("\(Int(store.kernelCounters.contextSwitchesPerSec))/s").bold().monospacedDigit()
                     Text("Syscalls:").foregroundStyle(.secondary)
                     Text("\(Int(store.kernelCounters.syscallsPerSec))/s").bold().monospacedDigit()
                 }
-                GridRow {
+                HStack {
                     Text("Page Faults:").foregroundStyle(.secondary)
                     Text("\(Int(store.kernelCounters.pageFaultsPerSec))/s").bold().monospacedDigit()
                     Text("COW Faults:").foregroundStyle(.secondary)
                     Text("\(Int(store.kernelCounters.cowFaultsPerSec))/s").bold().monospacedDigit()
                 }
-                GridRow {
+                HStack {
                     Text("Pageins / Pageouts:").foregroundStyle(.secondary)
                     Text("\(Int(store.kernelCounters.pageinsPerSec)) / \(Int(store.kernelCounters.pageoutsPerSec)) /s").bold().monospacedDigit()
                     Text("Zero-Fill:").foregroundStyle(.secondary)
@@ -430,20 +446,20 @@ public struct ContentView: View {
             ProgressView(value: min(store.memory.utilizationPercentage / 100.0, 1.0))
                 .tint(store.memory.utilizationPercentage > 85 ? .red : .blue)
             
-            Grid(alignment: .leading, horizontalSpacing: 20, verticalSpacing: 6) {
+            VStack(alignment: .leading, spacing: 6) {
-                GridRow {
+                HStack {
                     Text("Used:").foregroundStyle(.secondary)
                     Text(formatBytes(store.memory.usedBytes)).bold()
                     Text("Free:").foregroundStyle(.secondary)
                     Text(formatBytes(store.memory.freeBytes)).bold()
                 }
-                GridRow {
+                HStack {
                     Text("Wired:").foregroundStyle(.secondary)
                     Text(formatBytes(store.memory.wiredBytes))
                     Text("Compressed:").foregroundStyle(.secondary)
                     Text(formatBytes(store.memory.compressedBytes))
                 }
-                GridRow {
+                HStack {
                     Text("Swap Used:").foregroundStyle(.secondary)
                     Text(formatBytes(store.memory.swapUsedBytes))
                     Text("Swap Total:").foregroundStyle(.secondary)
@@ -587,10 +603,10 @@ public struct ContentView: View {
                     Text(s.protocolName)
                 }
                 TableColumn("Local Endpoint") { s in
-                    Text("\(s.localAddress):\(s.localPort)").monospaced()
+                    Text("\(s.localAddress):\(s.localPort)").mmMonospaced()
                 }
                 TableColumn("Remote Endpoint") { s in
-                    Text("\(s.remoteAddress):\(s.remotePort)").monospaced()
+                    Text("\(s.remoteAddress):\(s.remotePort)").mmMonospaced()
                 }
                 TableColumn("State") { s in
                     Text(s.tcpState).font(.caption).foregroundStyle(s.tcpState == "ESTABLISHED" ? .green : .secondary)
@@ -736,20 +752,20 @@ public struct ContentView: View {
             if !store.batteryHealth.hasBattery {
                 Text("Desktop Mac / No battery installed").font(.caption).foregroundStyle(.secondary)
             } else {
-                Grid(alignment: .leading, horizontalSpacing: 20, verticalSpacing: 6) {
+                VStack(alignment: .leading, spacing: 6) {
-                    GridRow {
+                    HStack {
                         Text("Cycle Count:").foregroundStyle(.secondary)
                         Text("\(store.batteryHealth.cycleCount) / \(store.batteryHealth.designCycleCount)").bold()
                         Text("Temperature:").foregroundStyle(.secondary)
                         Text(String(format: "%.1f°C", store.batteryHealth.temperature)).bold()
                     }
-                    GridRow {
+                    HStack {
                         Text("Voltage / Power:").foregroundStyle(.secondary)
                         Text("\(String(format: "%.2f V", store.batteryHealth.voltage)) (\(String(format: "%.1f W", store.batteryHealth.watts)))")
                         Text("Power Adapter:").foregroundStyle(.secondary)
                         Text(store.batteryHealth.externalConnected ? "\(store.batteryHealth.adapterWatts)W Connected" : "On Battery")
                     }
-                    GridRow {
+                    HStack {
                         Text("Capacity:").foregroundStyle(.secondary)
                         Text("\(store.batteryHealth.currentCapacity) / \(store.batteryHealth.maxCapacity) mAh")
                         Text("Manufacturer:").foregroundStyle(.secondary)
@@ -782,10 +798,10 @@ public struct ContentView: View {
                         .background(Color.secondary.opacity(0.15), in: Capsule())
                 }
                 TableColumn("Vendor ID") { d in
-                    Text(String(format: "0x%04x", d.vendorID)).monospaced()
+                    Text(String(format: "0x%04x", d.vendorID)).mmMonospaced()
                 }
                 TableColumn("Product ID") { d in
-                    Text(String(format: "0x%04x", d.productID)).monospaced()
+                    Text(String(format: "0x%04x", d.productID)).mmMonospaced()
                 }
                 TableColumn("Built-In") { d in
                     Text(d.isBuiltIn ? "Yes" : "External").foregroundStyle(d.isBuiltIn ? Color.secondary : Color.blue)
@@ -946,14 +962,14 @@ public struct ContentView: View {
                     .font(.title3.bold().monospacedDigit())
             }
             
-            Grid(alignment: .leading, horizontalSpacing: 20, verticalSpacing: 6) {
+            VStack(alignment: .leading, spacing: 6) {
-                GridRow {
+                HStack {
                     Text("CPU Power:").foregroundStyle(.secondary)
                     Text(String(format: "%.1f W", store.power.cpuWatts)).bold()
                     Text("GPU Power:").foregroundStyle(.secondary)
                     Text(String(format: "%.1f W", store.power.gpuWatts)).bold()
                 }
-                GridRow {
+                HStack {
                     Text("CPU Voltage:").foregroundStyle(.secondary)
                     Text(String(format: "%.2f V", store.power.cpuVoltage))
                     Text("CPU Current:").foregroundStyle(.secondary)
@@ -974,20 +990,20 @@ public struct ContentView: View {
             Text("Host Architecture & Kernel")
                 .font(.headline)
             
-            Grid(alignment: .leading, horizontalSpacing: 24, verticalSpacing: 10) {
+            VStack(alignment: .leading, spacing: 10) {
-                GridRow {
+                HStack {
                     Text("Hardware Model:").foregroundStyle(.secondary)
                     Text(store.hostModel).bold()
                     Text("Physical Cores:").foregroundStyle(.secondary)
                     Text("\(store.physicalCpuCount)").bold()
                 }
-                GridRow {
+                HStack {
                     Text("Darwin Kernel:").foregroundStyle(.secondary)
                     Text(store.kernelVersion).bold()
                     Text("Logical Cores:").foregroundStyle(.secondary)
                     Text("\(store.logicalCpuCount)").bold()
                 }
-                GridRow {
+                HStack {
                     Text("Target Architecture:").foregroundStyle(.secondary)
                     Text("Intel x86_64").bold()
                     Text("Deployment Target:").foregroundStyle(.secondary)
@@ -1205,6 +1221,7 @@ public struct ContentView: View {
 }
 
 // MARK: - Process Detail Inspector Sheet
+@MainActor
 struct ProcessDetailSheet: View {
     let inspector: MMProcessDetailInspector
     let pid: Int32
@@ -1233,8 +1250,9 @@ struct ProcessDetailSheet: View {
             if selectedDetailTab == "Threads" {
                 List(threads.indices, id: \.self) { idx in
                     let t = threads[idx]
+                    let threadID = "\(t["threadID"] ?? idx)"
                     HStack {
-                        Text("Thread \(t["threadID"] ?? idx)").bold()
+                        Text("Thread \(threadID)").bold()
                         Spacer()
                         Text("CPU: \(String(format: "%.1f%%", (t["cpuPercent"] as? Double) ?? 0.0))").monospacedDigit()
                         Text(t["state"] as? String ?? "").foregroundStyle(.secondary)
@@ -1247,11 +1265,16 @@ struct ProcessDetailSheet: View {
             } else {
                 List(sockets.indices, id: \.self) { idx in
                     let s = sockets[idx]
+                    let proto = s["protocol"] as? String ?? "TCP"
+                    let localAddr = (s["localAddress"] as? String) ?? ""
+                    let localPort = (s["localPort"] as? Int) ?? 0
+                    let remoteAddr = (s["remoteAddress"] as? String) ?? ""
+                    let remotePort = (s["remotePort"] as? Int) ?? 0
                     HStack {
-                        Text(s["protocol"] as? String ?? "TCP").bold()
+                        Text(proto).bold()
                         Spacer()
-                        Text("\(s["localAddress"] ?? ""):\(s["localPort"] ?? 0) → \(s["remoteAddress"] ?? ""):\(s["remotePort"] ?? 0)")
+                        Text("\(localAddr):\(localPort) → \(remoteAddr):\(remotePort)")
-                            .monospaced()
+                            .mmMonospaced()
                         Text(s["tcpState"] as? String ?? "").foregroundStyle(.secondary)
                     }
                 }

Sources/UI/MenuBar/QuickGlancePopoverView.swift

@@ -1,7 +1,8 @@
 import SwiftUI
 
+@MainActor
 public struct QuickGlancePopoverView: View {
-    var store: SystemTelemetryStore
+    @ObservedObject var store: SystemTelemetryStore
     
     public init(store: SystemTelemetryStore) {
         self.store = store
@@ -109,9 +110,7 @@ public struct QuickGlancePopoverView: View {
             }
             Spacer()
             Text(value)
-                .font(.subheadline)
+                .font(.system(size: 13, weight: .semibold, design: .monospaced))
-                .fontWeight(.semibold)
-                .fontDesign(.monospaced)
         }
     }
     

Sources/UI/Settings/AlertsSettingsView.swift

@@ -5,8 +5,9 @@ import UserNotifications
 
 /// Preferences UI for threshold alert rules. Bound directly to
 /// `AlertEngine.shared.configuration`, which auto-persists to `UserDefaults`.
+@MainActor
 public struct AlertsSettingsView: View {
-    @Bindable private var engine = AlertEngine.shared
+    @ObservedObject private var engine = AlertEngine.shared
     @State private var authorizationStatus: UNAuthorizationStatus = .notDetermined
 
     public init() {}
@@ -58,24 +59,24 @@ public struct AlertsSettingsView: View {
 
             Section("CPU Temperature") {
                 Toggle("High CPU Temperature Alert", isOn: $engine.configuration.cpuTempEnabled)
-                LabeledContent("Threshold") {
+                MMLabeledContent("Threshold") {
                     Slider(value: $engine.configuration.cpuTempThresholdC, in: 60...110, step: 1) {
                         EmptyView()
                     }
                     Text("\(Int(engine.configuration.cpuTempThresholdC))°C")
-                        .monospacedDigit()
+                        .mmMonospacedDigit()
                         .frame(width: 48, alignment: .trailing)
                 }
             }
 
             Section("Cooling Fans") {
                 Toggle("Fan Stall Alert", isOn: $engine.configuration.fanStallEnabled)
-                LabeledContent("Alert when CPU above") {
+                MMLabeledContent("Alert when CPU above") {
                     Slider(value: $engine.configuration.fanStallTempThresholdC, in: 40...100, step: 1) {
                         EmptyView()
                     }
                     Text("\(Int(engine.configuration.fanStallTempThresholdC))°C")
-                        .monospacedDigit()
+                        .mmMonospacedDigit()
                         .frame(width: 48, alignment: .trailing)
                 }
                 Text("Triggers when a fan reports 0 RPM while the CPU is hot.")
@@ -85,12 +86,12 @@ public struct AlertsSettingsView: View {
 
             Section("Memory") {
                 Toggle("Low Memory Alert", isOn: $engine.configuration.memoryEnabled)
-                LabeledContent("Free RAM below") {
+                MMLabeledContent("Free RAM below") {
                     Slider(value: $engine.configuration.memoryFreeMBThreshold, in: 100...4096, step: 50) {
                         EmptyView()
                     }
                     Text("\(Int(engine.configuration.memoryFreeMBThreshold)) MB")
-                        .monospacedDigit()
+                        .mmMonospacedDigit()
                         .frame(width: 64, alignment: .trailing)
                 }
                 Toggle("Alert on Critical Memory Pressure", isOn: $engine.configuration.memoryAlertOnCriticalPressure)
@@ -98,32 +99,32 @@ public struct AlertsSettingsView: View {
 
             Section("Storage") {
                 Toggle("Low Disk Space Alert", isOn: $engine.configuration.storageEnabled)
-                LabeledContent("Free space below") {
+                MMLabeledContent("Free space below") {
                     Slider(value: $engine.configuration.storageFreeGBThreshold, in: 1...100, step: 1) {
                         EmptyView()
                     }
                     Text("\(Int(engine.configuration.storageFreeGBThreshold)) GB")
-                        .monospacedDigit()
+                        .mmMonospacedDigit()
                         .frame(width: 48, alignment: .trailing)
                 }
-                LabeledContent("Free percent below") {
+                MMLabeledContent("Free percent below") {
                     Slider(value: $engine.configuration.storageFreePercentThreshold, in: 1...50, step: 1) {
                         EmptyView()
                     }
                     Text("\(Int(engine.configuration.storageFreePercentThreshold))%")
-                        .monospacedDigit()
+                        .mmMonospacedDigit()
                         .frame(width: 48, alignment: .trailing)
                 }
             }
 
             Section("Battery") {
                 Toggle("Low Battery Alert", isOn: $engine.configuration.batteryEnabled)
-                LabeledContent("Charge below") {
+                MMLabeledContent("Charge below") {
                     Slider(value: $engine.configuration.batteryPercentThreshold, in: 1...50, step: 1) {
                         EmptyView()
                     }
                     Text("\(Int(engine.configuration.batteryPercentThreshold))%")
-                        .monospacedDigit()
+                        .mmMonospacedDigit()
                         .frame(width: 48, alignment: .trailing)
                 }
                 Text("Only fires while discharging on battery power.")
@@ -131,7 +132,7 @@ public struct AlertsSettingsView: View {
                     .foregroundStyle(.secondary)
             }
         }
-        .formStyle(.grouped)
+        .mmFormStyleGrouped()
         .frame(minWidth: 480, minHeight: 520)
         .task { await refreshAuthorizationStatus() }
     }

Tests/MMAlertsTests.swift

@@ -128,8 +128,10 @@ final class MMAlertsTests: XCTestCase {
 
     func testStorageRuleTriggersPerVolume() {
         let volumes = [
-            StorageVolumeContext(mountPoint: "/", volumeName: "Macintosh HD", freeBytes: 5 * 1_073_741_824, freePercent: 5),
+            StorageVolumeContext(mountPoint: "/", volumeName: "Macintosh HD", freeBytes: 5 * 1_073_741_824,
-            StorageVolumeContext(mountPoint: "/Volumes/Data", volumeName: "Data", freeBytes: 500 * 1_073_741_824, freePercent: 50)
+                                 freePercent: 5, totalBytes: 500 * 1_073_741_824),
+            StorageVolumeContext(mountPoint: "/Volumes/Data", volumeName: "Data", freeBytes: 500 * 1_073_741_824,
+                                 freePercent: 50, totalBytes: 1_000_000_000_000)
         ]
         engine.evaluate(context(volumes: volumes))
         XCTAssertEqual(engine.activeAlerts.count, 1)
@@ -137,11 +139,32 @@ final class MMAlertsTests: XCTestCase {
     }
 
     func testStorageRuleTriggersOnLowPercent() {
-        let volumes = [StorageVolumeContext(mountPoint: "/Volumes/Big", volumeName: "Big", freeBytes: 200 * 1_073_741_824, freePercent: 4)]
+        let volumes = [StorageVolumeContext(mountPoint: "/Volumes/Big", volumeName: "Big",
+                                            freeBytes: 200 * 1_073_741_824, freePercent: 4,
+                                            totalBytes: 2_000_000_000_000)]
         engine.evaluate(context(volumes: volumes))
         XCTAssertEqual(engine.activeAlerts.count, 1)
     }
 
+    func testStorageRuleSkipsReadOnlyVolumes() {
+        // A read-only DMG mount (e.g. an app running from a mounted image)
+        // with ~0% free must not alert — issue #33 false positive.
+        let volumes = [StorageVolumeContext(mountPoint: "/Volumes/Ghostty", volumeName: "Ghostty",
+                                            freeBytes: 1_048_576, freePercent: 0.1,
+                                            totalBytes: 500_000_000_000, isReadOnly: true)]
+        engine.evaluate(context(volumes: volumes))
+        XCTAssertTrue(engine.activeAlerts.isEmpty)
+        XCTAssertTrue(engine.history.isEmpty)
+    }
+
+    func testStorageRuleSkipsTinyVolumes() {
+        let volumes = [StorageVolumeContext(mountPoint: "/Volumes/Small", volumeName: "Small",
+                                            freeBytes: 1_048_576, freePercent: 0.5,
+                                            totalBytes: 200_000_000, isReadOnly: false)]
+        engine.evaluate(context(volumes: volumes))
+        XCTAssertTrue(engine.activeAlerts.isEmpty)
+    }
+
     // MARK: Battery
 
     func testBatteryRuleTriggersOnlyWhileDischarging() {

Tests/MMMenuBarTests.swift

@@ -2,6 +2,7 @@ import XCTest
 import SwiftUI
 @testable import MacMonitor
 
+@MainActor
 final class MMMenuBarTests: XCTestCase {
     
     func testMenuBarStatusViewInitialization() {

Tests/MMNetworkBandwidthTests.swift

@@ -49,7 +49,8 @@ final class MMNetworkBandwidthTests: XCTestCase {
             withCurrentSnapshots: curr,
             previousSnapshots: prev,
             timeDelta: timeDelta,
-            ipAddresses: ipDict
+            ipAddresses: ipDict,
+            interfaceUpFlags: ["en0": true, "lo0": true]
         )
         
         let totalDownBps = metrics["totalDownloadBytesPerSec"] as? Double ?? 0

Tests/MMSnapshotContractTests.swift

@@ -0,0 +1,162 @@
+import XCTest
+@testable import MacMonitor
+
+/// Snapshot contract conformance tests (Issues #30 / #31).
+/// Feeds synthetic dictionaries keyed exactly as the Objective-C providers emit them
+/// through `SystemTelemetryStore.decodeSnapshot` and asserts the decoded Swift models
+/// populate — guarding against provider-identifier and field-name drift.
+@MainActor
+final class MMSnapshotContractTests: XCTestCase {
+
+    private var store: SystemTelemetryStore { SystemTelemetryStore.shared }
+
+    // MARK: - Provider identifier coverage (#30)
+
+    func testEmittedProviderIdentifiersAreDecoded() {
+        // The four identifiers that previously never reached the decoder.
+        let snapshot: [String: [String: Any]] = [
+            "com.i3omb.macmonitor.telemetry.cpuload": [
+                "userPercent": 25.0, "systemPercent": 15.0,
+                "idlePercent": 60.0, "totalPercent": 40.0,
+                "cores": [["totalPercent": 10.0], ["totalPercent": 90.0]],
+                "frequencyHz": 2.4e9, "isThrottled": false
+            ],
+            "com.i3omb.macmonitor.telemetry.kernel.counters": [
+                "contextSwitchesRate": 1234.5, "syscallsRate": 9876.5,
+                "pageFaultsRate": 42.0, "cowFaultsRate": 3.0,
+                "zeroFillsRate": 7.0, "pageinsRate": 1.0, "pageoutsRate": 0.5,
+                "cumulative_contextSwitches": 999_999 as UInt64,
+                "cumulative_syscalls": 888_888 as UInt64,
+                "cumulative_pageFaults": 777_777 as UInt64
+            ],
+            "com.i3omb.macmonitor.telemetry.system.load": [
+                "load1m": 1.5, "load5m": 2.0, "load15m": 2.5,
+                "taskCount": 400, "threadCount": 2000, "machFactor": 0.75
+            ],
+            "com.i3omb.macmonitor.telemetry.storage.io": [
+                "disks": [[
+                    "bsdName": "disk0",
+                    "readBytesPerSec": 1_048_576.0, "writeBytesPerSec": 524_288.0,
+                    "readIOPS": 120.0, "writeIOPS": 60.0,
+                    "cumulativeReadBytes": 9_999_999 as UInt64,
+                    "cumulativeWriteBytes": 8_888_888 as UInt64
+                ]]
+            ]
+        ]
+
+        store.decodeSnapshot(snapshot)
+
+        XCTAssertEqual(store.cpuLoad.userLoad, 25.0, accuracy: 0.001)
+        XCTAssertEqual(store.cpuLoad.systemLoad, 15.0, accuracy: 0.001)
+        XCTAssertEqual(store.cpuLoad.totalLoad, 40.0, accuracy: 0.001)
+        XCTAssertEqual(store.cpuLoad.perCoreLoad, [10.0, 90.0])
+        XCTAssertEqual(store.cpuLoad.cpuFrequencyMHz, 2400.0, accuracy: 0.001)
+
+        XCTAssertEqual(store.kernelCounters.contextSwitchesPerSec, 1234.5, accuracy: 0.001)
+        XCTAssertEqual(store.kernelCounters.syscallsPerSec, 9876.5, accuracy: 0.001)
+        XCTAssertEqual(store.kernelCounters.totalContextSwitches, 999_999)
+        XCTAssertEqual(store.kernelCounters.totalSyscalls, 888_888)
+        XCTAssertEqual(store.kernelCounters.totalPageFaults, 777_777)
+
+        XCTAssertEqual(store.systemLoad.load1Min, 1.5, accuracy: 0.001)
+        XCTAssertEqual(store.systemLoad.load5Min, 2.0, accuracy: 0.001)
+        XCTAssertEqual(store.systemLoad.load15Min, 2.5, accuracy: 0.001)
+        XCTAssertEqual(store.systemLoad.taskCount, 400)
+        XCTAssertEqual(store.systemLoad.threadCount, 2000)
+
+        XCTAssertEqual(store.diskIO.count, 1)
+        XCTAssertEqual(store.diskIO[0].bsdName, "disk0")
+        XCTAssertEqual(store.diskIO[0].readBps, 1_048_576.0, accuracy: 0.001)
+        XCTAssertEqual(store.diskIO[0].totalBytesRead, 9_999_999)
+    }
+
+    // MARK: - Field-name drift (#31)
+
+    func testMemoryUtilizationComputedFromUsedOverTotal() {
+        store.decodeSnapshot([
+            "com.i3omb.macmonitor.telemetry.memory": [
+                "totalBytes": 16_000_000_000 as UInt64,
+                "usedBytes": 8_000_000_000 as UInt64,
+                "freeBytes": 8_000_000_000 as UInt64,
+                "memoryPressureStatus": "Normal"
+            ]
+        ])
+        XCTAssertEqual(store.memory.utilizationPercentage, 50.0, accuracy: 0.001)
+    }
+
+    func testStorageVolumeEmitsUsedPercentAndFSType() {
+        store.decodeSnapshot([
+            "com.i3omb.macmonitor.telemetry.storage": [
+                "volumes": [[
+                    "volumeName": "Macintosh HD", "mountPoint": "/",
+                    "devicePath": "/dev/disk1s1", "fsType": "apfs",
+                    "totalBytes": 500_000_000_000 as UInt64,
+                    "usedBytes": 250_000_000_000 as UInt64,
+                    "freeBytes": 250_000_000_000 as UInt64,
+                    "usedPercent": 50.0, "isReadOnly": false
+                ]]
+            ]
+        ])
+        XCTAssertEqual(store.storageVolumes.count, 1)
+        XCTAssertEqual(store.storageVolumes[0].usedPercentage, 50.0, accuracy: 0.001)
+        XCTAssertEqual(store.storageVolumes[0].fileSystem, "apfs")
+    }
+
+    func testNetworkInterfaceEmittedKeys() {
+        store.decodeSnapshot([
+            "com.i3omb.macmonitor.telemetry.network.bandwidth": [
+                "interfaces": [[
+                    "name": "en0", "isUp": true, "ipv4Address": "192.168.1.10",
+                    "downloadBytesPerSec": 5_000.0, "uploadBytesPerSec": 1_000.0,
+                    "downloadPacketsPerSec": 40.0, "uploadPacketsPerSec": 20.0,
+                    "cumulativeInBytes": 10_000_000 as UInt64,
+                    "cumulativeOutBytes": 5_000_000 as UInt64
+                ]]
+            ]
+        ])
+        XCTAssertEqual(store.networkBandwidth.count, 1)
+        let iface = store.networkBandwidth[0]
+        XCTAssertEqual(iface.interfaceName, "en0")
+        XCTAssertTrue(iface.isUp)
+        XCTAssertEqual(iface.ipAddress, "192.168.1.10")
+        XCTAssertEqual(iface.downloadBps, 5_000.0, accuracy: 0.001)
+        XCTAssertEqual(iface.totalBytesIn, 10_000_000)
+    }
+
+    func testProcessResidentAndVirtualBytesDecode() {
+        store.decodeSnapshot([
+            "com.i3omb.macmonitor.telemetry.process": [
+                "processes": [[
+                    "pid": 42, "ppid": 1, "name": "testproc",
+                    "cpuPercent": 3.5,
+                    "residentBytes": 100_000_000 as UInt64,
+                    "virtualBytes": 400_000_000 as UInt64,
+                    "threadCount": 5, "uid": 501, "username": "gordon",
+                    "isStopped": false, "isZombie": false
+                ]]
+            ]
+        ])
+        XCTAssertEqual(store.processes.count, 1)
+        XCTAssertEqual(store.processes[0].residentSize, 100_000_000)
+        XCTAssertEqual(store.processes[0].virtualSize, 400_000_000)
+        XCTAssertFalse(store.processes[0].isStopped)
+        XCTAssertFalse(store.processes[0].isZombie)
+    }
+
+    func testFanEmittedKeysDecode() {
+        store.decodeSnapshot([
+            "com.i3omb.macmonitor.telemetry.fan": [
+                "fans": [[
+                    "fanIndex": 0, "name": "Exhaust",
+                    "currentRPM": 2000.0, "minRPM": 1200.0,
+                    "maxRPM": 6000.0, "targetRPM": 2000.0,
+                    "utilizationPercent": 16.67
+                ]]
+            ]
+        ])
+        XCTAssertEqual(store.fans.count, 1)
+        XCTAssertEqual(store.fans[0].index, 0)
+        XCTAssertEqual(store.fans[0].name, "Exhaust")
+        XCTAssertEqual(store.fans[0].utilization, 16.67, accuracy: 0.01)
+    }
+}

project.yml

@@ -16,8 +16,8 @@ settings:
     CLANG_ENABLE_OBJC_ARC: YES
     CLANG_ENABLE_MODULES: YES
     GENERATE_INFOPLIST_FILE: YES
-    MARKETING_VERSION: "0.0.1"
+    MARKETING_VERSION: "0.0.2"
-    CURRENT_PROJECT_VERSION: "1"
+    CURRENT_PROJECT_VERSION: "2"
     CODE_SIGNING_ALLOWED: NO
     CODE_SIGN_IDENTITY: ""
     GCC_C_LANGUAGE_STANDARD: "gnu17"