feat(#41): Revert target deployment configuration to macOS 12

.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:

.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`)

MacMonitor.xcodeproj/project.pbxproj

@@ -698,7 +698,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.i3omb.MacMonitor;
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Sources/Bridging/MacMonitor-Bridging-Header.h";
@@ -720,7 +720,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.i3omb.MacMonitorTests;
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Sources/Bridging/MacMonitor-Bridging-Header.h";
@@ -778,7 +778,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				MARKETING_VERSION = 0.0.2;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
@@ -807,7 +807,7 @@
 					"@executable_path/../Frameworks",
 					"@loader_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.i3omb.MacMonitorTests;
 				SDKROOT = macosx;
 				SWIFT_OBJC_BRIDGING_HEADER = "Sources/Bridging/MacMonitor-Bridging-Header.h";
@@ -871,7 +871,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 12.0;
 				MARKETING_VERSION = 0.0.2;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
@@ -902,7 +902,7 @@
 					"$(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";