Add arm64 (Apple Silicon) support with universal binary (#476)

- Set ARCHS = "arm64 x86_64" explicitly in project-level Debug and Release configs
- Raise MACOSX_DEPLOYMENT_TARGET from 10.12.2 to 11.0 (minimum macOS for Apple Silicon)
- Pass ARCHS="arm64 x86_64" in build.sh and CI workflows to guarantee universal output
- Update CI action versions (checkout@v3, setup-node@v3, Node 18.x)
- Add lipo verification step in build-test CI to confirm universal binary

Sparkle.framework was already a universal binary (x86_64 + arm64).

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/build-test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: macOS-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
 
       - name: Run tests
         run: xcodebuild test -project MTMR.xcodeproj -scheme 'UnitTests' | xcpretty -c && exit ${PIPESTATUS[0]}
@@ -16,7 +16,10 @@ jobs:
     runs-on: macOS-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
 
-      - name: Build
+      - name: Build (universal binary)
-        run: xcodebuild archive -project "MTMR.xcodeproj" -scheme "MTMR" -archivePath Release/App.xcarchive DEVELOPMENT_TEAM="" CODE_SIGN_IDENTITY="" | xcpretty -c && exit ${PIPESTATUS[0]}
+        run: xcodebuild archive -project "MTMR.xcodeproj" -scheme "MTMR" -archivePath Release/App.xcarchive DEVELOPMENT_TEAM="" CODE_SIGN_IDENTITY="" ARCHS="arm64 x86_64" | xcpretty -c && exit ${PIPESTATUS[0]}
+
+      - name: Verify universal binary
+        run: lipo -info Release/App.xcarchive/Products/Applications/MTMR.app/Contents/MacOS/MTMR

.github/workflows/publish.yml

@@ -12,18 +12,18 @@ jobs:
     runs-on: macOS-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
 
       - name: Set up Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 18.x
 
       - name: Install create-dmg
         run: npm i -g create-dmg
 
-      - name: Build Archive
+      - name: Build Archive (universal binary)
-        run: xcodebuild archive -project "MTMR.xcodeproj" -scheme "MTMR" -archivePath Release/App.xcarchive DEVELOPMENT_TEAM="" CODE_SIGN_IDENTITY="" | xcpretty -c && exit ${PIPESTATUS[0]}
+        run: xcodebuild archive -project "MTMR.xcodeproj" -scheme "MTMR" -archivePath Release/App.xcarchive DEVELOPMENT_TEAM="" CODE_SIGN_IDENTITY="" ARCHS="arm64 x86_64" | xcpretty -c && exit ${PIPESTATUS[0]}
 
       - name: Build App
         run: xcodebuild -project "MTMR.xcodeproj" -exportArchive -archivePath Release/App.xcarchive -exportOptionsPlist export-options.plist -exportPath Release | xcpretty -c && exit ${PIPESTATUS[0]}

MTMR.xcodeproj/project.pbxproj

@@ -550,6 +550,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				ARCHS = "arm64 x86_64";
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
@@ -595,7 +596,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.12.2;
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
@@ -608,6 +609,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				ARCHS = "arm64 x86_64";
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
@@ -648,7 +650,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.12.2;
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";

MTMR/Info.plist

@@ -19,7 +19,7 @@
 	<key>CFBundleShortVersionString</key>
 	<string>0.27</string>
 	<key>CFBundleVersion</key>
-	<string>448</string>
+	<string>452</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.utilities</string>
 	<key>LSMinimumSystemVersion</key>

build.sh

@@ -6,7 +6,8 @@ rm -r Release 2>/dev/null
 
 xcodebuild archive \
 	-scheme "$NAME" \
-	-archivePath Release/App.xcarchive | xcpretty -c
+	-archivePath Release/App.xcarchive \
+	ARCHS="arm64 x86_64" | xcpretty -c
 
 xcodebuild \
 	-exportArchive \