MacOS on VMware

Apple's license terms are generally regarded as stating that you can only legally run the Mac operating system on genuine Apple Mac computers. It is possible to do so in a virtual environment but that virtual environment has to be hosted on a Mac.

VMware do offer a version of ESXi that can run on Mac hardware although this obviously does not solve the requirement for needing Mac hardware. (Currently ESXi is certified for running only on the Mac Pro model, but can run on all Macs.)

For your requirement of running Apple's caching server function you could easily do this on a Mac mini computer - even an older model. Mac minis can even be fitted in to a bracket for rack mounting purposes. Since the software will be free all you need to pay for is a Mac mini and this could be a secondhand or existing one.

Parallels Mac Management for SCCM also will not solve your problem. It is merely a way of managing Macs via SCCM, it does not magically avoid the need to buy genuine Mac hardware.

(As an aside most people feel that it is better to use Apple specific tools to manage Apple devices rather than trying to force a round peg in to a square hole and e.g. using Active Directory GPO to manage Macs.)

Native hardware is required for macOS, so you’ll be booting macOS directly on a Mac for what you want, or potentially as a guest on that hardware. For VMware on Mac hardware, one of the better resources: https://www.virtuallyghetto.com/category/apple-2

No, I don’t.

ps: The archives for the MacEnterprise mailing list might also be interesting to you, as well as the list for newer or different questions. Discussions of Apple Remote Desktop, Munki and other tools to be had there, too.