macOS 11 Big Sur is now generally available on GitHub-hosted runners. Use GitHub Actions to build and publish apps for the latest Apple ecosystem by updating your workflows to include runs-on: macos-11

    runs-on: macos-11
      - uses: actions/checkout@v2
      - name: Build
        run: swift build
      - name: Run tests
        run: swift test

The macOS 11 Big Sur runner image has different tools and tool versions than macOS 10.15 Catalina. See the full list of changed software.

If you spot any issues with your workflows when using Big Sur, please let us know by creating an issue in the virtual-environments repository.