[HELP] Use 3 monitors in Hackintosh with 7970 ATI

[Sergiio]

Hi, i use three monitors on Windows, and it works correctly.

 

The problem comes when I try to use in Hackintosh, only the first two monitors work.And if I disconnect one of them, the third work.

 

But never the three monitors at once.

 

As I can do may work three monitors?

 

My graph is a 7970 ATI 3GB, board is Gigabyte GA-Z77-DS3H, and i7-3770.

 

Thanks