I just read an article at pcworld.com that states Kaby Lake will only support Windows 10. There was a blurb about Linux that left me wondering what the ramifications for Linux users wanting to run Kaby Lake. The article didn't mention MAC at all, so I thought maybe Microsoft is trying to squeeze all other OSs out. I'm sure they'd like to. 'Just not sure if Intel would go along with it.
It only applies to Windows. Of course Kaby Lake will support Mac and Linux et al. I also believe that the same goes for Zen. Windows 10 only.