booting issues with P9X79 deluxe and 3930k

[Atheim]

PLEASE HELP !! unable to pass the apple grey screen

Hello

I just finished my build :
P9X79 deluxe
i7 3930k
Gygabite GTX 660 OC
8 GB ram
256 ssd
2tb hdd

So I bought osx on my mother's mac pro, created a usb with osx on it but im not able to get osx started. When I start my pc, i get the chimera boot screen, where i chose osx. Then the grey screen with the apple logo appears, but it can stay like that four hours (yes, it stayed like that a whole night). Usualy when osx starts, you get this screen but you also get after a few seconds some like of loading circle, thats shows something is actually booting or strating. I just get nothing.

Please help !

 

[Atheim]

UP Please, I really need some help !!