So yeah...the answer is this...technically you can run macOS on non-Apple hardware but you are violating Apple's terms of service. I think I remember someone telling me in some countries Apple's terms of service may not be enforceable on this, but I don't know if that's true or not. Interestingly I recently read a blog post by a well known dev that built himself a Hackintosh, not sure if its being used a development machine or was just for fun.