Add back workflow lost in release process.

Author: rpavlik

.github/workflows/build-macos.yml

@@ -0,0 +1,57 @@
+# Copyright 2021-2024, Collabora, Ltd.
+# SPDX-License-Identifier: CC0-1.0
+
+name: macOS builds
+on:
+  workflow_call:
+    inputs:
+      organizeAndRelease:
+        description: "Should we organize and release our artifacts?"
+        type: boolean
+        default: false
+  workflow_dispatch:
+
+jobs:
+  build-macos:
+    runs-on: macos-latest
+
+    steps:
+      # Step 1: Checkout the repository
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+
+      # Step 2: Set up Homebrew and install dependencies
+      - name: Install Dependencies
+        run: |
+          brew update
+          brew install cmake ninja
+          # Add any additional dependencies here
+
+      # Step 3: Configure the build with CMake
+      - name: Configure Build
+        run: |
+          mkdir build
+          cd build
+          cmake -G Ninja \
+                -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+                -DCMAKE_INSTALL_PREFIX=../install \
+                ..
+
+      # Step 4: Build the project
+      - name: Build OpenXR Loader
+        run: |
+          cd build
+          cmake --build . --target install
+
+      # Step 5: Package the build artifacts
+      - name: Package Artifacts
+        run: |
+          cd install
+          tar -czvf OpenXR-Loader-macos-${GITHUB_REF#refs/tags/}.tar.gz *
+
+      # Step 6: Upload the build artifacts
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: OpenXR-Loader-macos-${GITHUB_REF#refs/tags/}
+          path: install/OpenXR-Loader-macos-${GITHUB_REF#refs/tags/}.tar.gz