Workflow try for mac

Author: Hellmark

.github/workflows/cmake-macos.yml

@@ -0,0 +1,49 @@
+name: Build Decode (macOS)
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-macos:
+    runs-on: macos-latest
+
+    steps:
+    - name: Checkout source
+      uses: actions/checkout@v4
+
+    - name: Install Qt 6 and build tools
+      run: |
+        brew update
+        brew install cmake ninja qt6 create-dmg openssl-devel
+
+    - name: Configure with CMake
+      run: |
+        cmake -B build -G Ninja \
+          -DCMAKE_BUILD_TYPE=Release \
+          -DCMAKE_PREFIX_PATH="$(brew --prefix qt6)"
+
+    - name: Build project
+      run: cmake --build build
+
+    - name: Make DMG
+      run: |
+        APP_NAME="Decode"
+        VERSION="${{ github.ref_name || 'dev' }}-${{ github.run_number }}"
+        APP_BUNDLE="build/${APP_NAME}.app"
+        DMG_NAME="${APP_NAME}-${VERSION}.dmg"
+        mkdir -p build/dmg_temp
+        cp -R "${APP_BUNDLE}" build/dmg_temp/
+        ln -s /Applications build/dmg_temp/Applications
+        hdiutil create -volname "${APP_NAME} Installer" \
+          -srcfolder build/dmg_temp \
+          -ov -format UDZO build/${DMG_NAME}
+        echo "DMG_NAME=${DMG_NAME}" >> $GITHUB_ENV
+
+    - name: Upload DMG
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ env.DMG_NAME }}
+        path: build/${{ env.DMG_NAME }}