We can't actually run the tests yet because we don't have hardware, and even if we did have hardware we still couldn't run any tests that require the shell because we don't have an Apple Silicon ready MozJS ESR to upgrade to. However, we can at least stand up a compile only builder on the XCode 12 enabled Intel macOS hosts and do a cross compile, locking in our ability to target the Apple Silicon platform. That should make our job much easier when it comes time to actually support the platform in earnest.