IIRC, the license requires that the software only be installed on an ‘Apple-branded’ device…so slap an Apple sticker on it and you’re good to go!
VirtualBox has experimental support for Mac hardware emulation.
The Mac OS license does not allow for the installation of Mac OS on non-apple hardware.
There have been a few instances of modders claiming they have been able to load Mac OS on a PC, but the work around methods are quite involved and not worth the effort.
Mac continues to be “proprietary”.
Hope this helps!