Add workflow to include pre-built loader on macOS

.github/workflows/macos-build-preset.yml

@@ -0,0 +1,57 @@
+# Copyright 2021-2024, Collabora, Ltd.
+# SPDX-License-Identifier: CC0-1.0
+
+name: macOS builds
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  macos-build:
+    runs-on: macos-latest
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Install Dependencies
+        run: |
+          brew update
+          brew install --formula cmake ninja
+          # Add any additional dependencies here
+
+      - name: Configure Build
+        run: |
+          mkdir build
+          cd build
+          cmake -G Ninja \
+                -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+                -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" \
+                -DCMAKE_INSTALL_PREFIX=../install \
+                ..
+
+      - name: Build OpenXR Loader
+        run: |
+          cd build
+          cmake --build . --target install
+
+      # Note: The com.apple.quarantine attribute is a macOS extended attribute that 
+      # marks files as downloaded from the internet. When this flag is set, macOS’s 
+      # Gatekeeper enforces security checks, prompting users to confirm whether they 
+      # want to open the file. For developers who download the pre-built OpenXR Loader
+      # using a web browser, they need to manually remove the quarantine attribute.
+      - name: Add a note about the Quarantine flag
+        run: |
+          cd install
+          echo "After unzipping the package, run 'xattr -d com.apple.quarantine lib/libopenxr_loader.dylib' to allow using the pre-built loader on macOS computers" > README.md
+
+      - name: Package Artifacts
+        run: |
+          cd install
+          tar -czvf openxr_loader_macos.tar.gz *
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: openxr_loader_macos
+          path: install/openxr_loader_macos.tar.gz

.github/workflows/release.yml

@@ -18,3 +18,6 @@ jobs:
     uses: ./.github/workflows/windows-matrix.yml
     with:
       organizeAndRelease: true
+
+  macos-build:
+    uses: ./.github/workflows/macos-build-preset.yml