macOS has been running on A series chips since the beginning of the transition to Apple Silicon. The original developer Macs had an "A12Z" CPU. https://en.wiki

macOS has been running on A series chips since the beginning of the transition to Apple Silicon. The original developer Macs had an "A12Z" CPU. https://en.wikipedia.org/wiki/Developer_Transition_Kit https://en.wikipedia.org/wiki/Developer_Transition_Kit