I run Linux and test my Windows releases on a VM. It works great.

Sure, I'm not doing performance benchmarking and it's just smoke tests and basic user stories, but that's all that 98% of indie developers do for cross platform support.

Apple has been intensely stupid as a platform to launch on, though I did do it eventually. I didn't like Apple before and now I like it even less.

I develop a game that easily runs on much weaker hardware and runs fine in a VM, I would say most simple 3D & 2D games would work fine in a VM on modern hardware.

However, these days it's possible pass-through hardware to your VM so I would be able to pass through a 2nd GPU to MacOS...if it would let me run it as a guest.

on linux, KVM provides passthrough for GPUs and other hardware, so the VM "steals" the passed through resources from the host and provides near-native performance.