[johnt15]

It works fine on OSX 10.12.6. You need the following customizations (not sure what's in OSX-KVM already):

- tell explicitly it's a "Penryl" CPU (<model fallback='allow'>Penryl</model>)

- force AES instructions in order to use encryption effectively (<feature policy='require' name='aes'/>)

- explicitly define topology (<topology sockets='1' cores='8' threads='2'/>)

- use usb-tablet (<input type='tablet' bus='usb'/>) for much more convenient mouse input that does not lock to window. Initial setup may need to be done with usb mouse (<input type='mouse' bus='usb'/>)

All of the above need to be reflected in QEMU command line.

I've been using this setup for last half year without issues (mostly heavy compiling).

I'm looking forward porting this setup to 32-core Threadripper. Would be a hell of a beast that outperforms Apple HW that costs several times more.