Technically I believe you're still "covered" if you were to e.g. run a macOS VM, under some non-macos "host", on Mac hardware.
I'd imagine the most common scenario for that would be macOS guests running on ESXi on Mac hardware, but my understanding is that e.g. a macOS guest under say Vbox or KVM with a linux host OS should also be "ok" in terms of the EULA.
Someone quoted the actual EULA below. I won't repost it since I don't want to steal their thunder, but it's very clear you can virtualize macOS up to two instances on your Mac computer.
Extremely limiting, and a real bummer.
Here in 2020, Apple invests a lot of resources to allow other OS's to be virtualized on macOS, but you still can't virtualize macOS on other OS's
I doubt it. VMware would need to develop special drivers just for macOS, since there seems to be practically zero cooperation from Apple here. Even with some compatibility shim or custom drivers, just like Hackintoshes, these VM's would be subject to breaking on every OS update.
And the EULA clearly states it only allows up to 2 instances of macOS to be virtualized on a Mac computer already running Apple software, ie macOS.[1]
