amended build target version numbers

README.md

@@ -28,7 +28,7 @@ This directory is the **native AppKit implementation** of [`SPEC.md`](SPEC.md).
 
 | Item | Value |
 |------|--------|
-| macOS | 10.15 Catalina → 26+ Tahoe |
+| macOS | Intel **10.15** Catalina · Apple Silicon **11.0** Big Sur → 26+ Tahoe |
 | Architecture | Universal 2 (Intel + Apple Silicon) |
 | Xcode | Command Line Tools / full Xcode (Swift 5) |
 | Sandbox | Hardened Runtime **on**, App Sandbox **off** |

Scripts/build_macos.sh

@@ -34,7 +34,8 @@ if xcodebuild_works; then
     # shellcheck source=lib.sh
     source "$SCRIPTS/lib.sh"
     JOBS="$(cpu_jobs)"
-    echo "==> Building TargetPrint ($CONFIGURATION, $ARCH) with $XCODEBUILD (-jobs $JOBS)"
+    MIN_OS="$(min_os_for_arch "$ARCH")"
+    echo "==> Building TargetPrint ($CONFIGURATION, $ARCH, min $MIN_OS) with $XCODEBUILD (-jobs $JOBS)"
     rm -rf "$OUT_DIR"
     mkdir -p "$OUT_DIR" "$DD_DIR"
     "$XCODEBUILD" \
@@ -47,6 +48,7 @@ if xcodebuild_works; then
         -derivedDataPath "$DD_DIR" \
         CONFIGURATION_BUILD_DIR="$OUT_DIR" \
         ONLY_ACTIVE_ARCH=NO \
+        MACOSX_DEPLOYMENT_TARGET="$MIN_OS" \
         CODE_SIGN_IDENTITY="${MACOS_CODESIGN_IDENTITY:--}" \
         CODE_SIGNING_ALLOWED=YES \
         ENABLE_HARDENED_RUNTIME=YES \

Scripts/lib.sh

@@ -39,6 +39,15 @@ cpu_jobs() {
     sysctl -n hw.ncpu 2>/dev/null || nproc 2>/dev/null || echo 4
 }
 
+# Intel: Catalina 10.15. Apple Silicon did not exist until Big Sur 11.0.
+min_os_for_arch() {
+    case "$1" in
+        x86_64) echo "${MACOSX_DEPLOYMENT_TARGET_X86_64:-10.15}" ;;
+        arm64)  echo "${MACOSX_DEPLOYMENT_TARGET_ARM64:-11.0}" ;;
+        *) echo "10.15" ;;
+    esac
+}
+
 zip_app() {
     local app="$1"
     local dest="$2"

Scripts/swiftc_build.sh

@@ -20,22 +20,17 @@ BIN="$MACOS_DIR/TargetPrint"
 
 SDKROOT="${SDKROOT:-$(xcrun --sdk macosx --show-sdk-path)}"
 SWIFT="${SWIFT:-$(xcrun --find swiftc)}"
-# Match the SDK so swiftc uses the prebuilt stdlib. Targeting macos10.15
-# with a modern CLT compiler forces a multi-minute stdlib rebuild and
-# still may not find a compatible x86_64 runtime.
-SDK_VER="$(xcrun --sdk macosx --show-sdk-version 2>/dev/null || sw_vers -productVersion)"
-SDK_VER="${SDK_VER%%$'\n'*}"
-TARGET="${ARCH}-apple-macos${SDK_VER}"
-MIN_OS="10.15"
 
 # shellcheck source=lib.sh
 source "$(dirname "$0")/lib.sh"
 JOBS="$(cpu_jobs)"
+MIN_OS="$(min_os_for_arch "$ARCH")"
+TARGET="${ARCH}-apple-macos${MIN_OS}"
 
 echo "==> swiftc build ($CONFIGURATION, $ARCH, $JOBS threads)"
 echo "    SDKROOT=$SDKROOT"
 echo "    SWIFT=$SWIFT"
-echo "    TARGET=$TARGET"
+echo "    TARGET=$TARGET  (min $MIN_OS)"
 
 rm -rf "$APP"
 mkdir -p "$MACOS_DIR" "$RES_DIR"

Sources/Controllers/PreviewWindowController.swift

@@ -1,4 +1,5 @@
 import AppKit
+import UniformTypeIdentifiers
 
 /// SPEC §9 — three-pane window: thumbnails | canvas | inspector.
 
@@ -211,7 +212,15 @@ final class PreviewWindowController: NSWindowController {
         let panel = NSOpenPanel()
         panel.allowsMultipleSelection = true
         panel.canChooseDirectories = false
+        if #available(macOS 12.0, *) {
+            var types: [UTType] = [.tiff, .json]
+            if let jobType = UTType(filenameExtension: "targetjob") {
+                types.append(jobType)
+            }
+            panel.allowedContentTypes = types
+        } else {
             panel.allowedFileTypes = ["tif", "tiff", "targetjob", "json"]
+        }
         panel.begin { result in
             if result == .OK { completion(panel.urls) }
         }

Sources/Printing/ColorMatching.swift

@@ -82,12 +82,17 @@ enum ColorMatching {
     static func stripColorMatchingAccessories(from panel: NSPrintPanel) {
         let accessories = panel.accessoryControllers
         for ac in accessories {
-            let title = (ac.title ?? "") + " " + (ac.nibName ?? "")
+            let cls = NSStringFromClass(type(of: ac))
+            let title = (ac.title ?? "") + " " + (ac.nibName ?? "") + " " + cls
             let hay = title.lowercased()
             if hay.contains("color matching") || hay.contains("colour matching") || hay.contains("colormatch") {
-                panel.removeAccessoryController(ac)
+                // SDK types this as NSViewController; removeAccessoryController
+                // requires NSPrintPanelAccessorizing (SPEC §7.2).
+                if let accessor = ac as? (NSViewController & NSPrintPanelAccessorizing) {
+                    panel.removeAccessoryController(accessor)
                     TPLog.info("Removed print-panel accessory: \(title)")
                 }
             }
         }
     }
+}