Well, it's dead. It was dead even before M1. It's not fun to render on CPU.
> GPU rendering is only supported on Windows and Linux; macOS is currently not supported.
https://docs.blender.org/manual/en/latest/render/cycles/gpu_...
> GPU rendering is only supported on Windows and Linux; macOS is currently not supported.
https://docs.blender.org/manual/en/latest/render/cycles/gpu_...
It'll prolly be in the 2.93 alpha soon.