[999_cirno]

Yes! That is arguably the killer feature. You can virtualize macOS in macOS with (nearly) native speed and this is officially supported. Heck, even can run multiple of them at the same time.

See docs here: https://developer.apple.com/documentation/virtualization/vir...

And projects like Tart, VirtualBuddy, etc. provide convenient wrappers for these APIs.

[fragmede]

The limit is two. You are not allowed to run more than two macOS VMs. Also Tart VMs have problems with signing into icloud and other things that need a real secureID enclave.