Can’t select Other OS in the Windows 8/10 features

[Boutsi Lol]

I am trying to do a hackintosh on my pc and the vital option other os is missing from the bios page. My motherboard is AORUS GAMING K3 Z370. Plz HELP

 

[ElectrO_90]

Bios page?
It won't be in bios, it will be after booting up it gives you the option.