I've installed Yosemite (and ML, and MAV on separate partitions) on my Mac Pro 1,1 (now with 2,1 firmware). I've tried with both alpha piker and chameleon. Not a graphics issue either, as i've tried both flashed 7300gt and 9500gt... and safe boot.
In all situations my usb devices fail... I'm using usb keyboard and mouse (tried both apple and logitech), and can't login... my mouse pointer hops across the screen and my keyboard clicks repeat!
now in reality i could boot the drive on my supported macbook and remove the login prompts but the issue still stands that my usb ports are not working properly on any unsupported OSx.
i've tried unplugging/replugging that has worked with pc hackintosh in the past, but when i replug they don't even work at all lol.
seems that I need some custom kext or a patched dsdt.
anyone else experience this, or better yet solve this?
what I know:
not dependant on hack method
not dependant on which unsupported OSx i install.
not dependant on with firmware 1,1 and 2,1.
ty ty.