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Black screen with cursor after Yosemite installation


tattar8
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Hey,

 

I have a ASRock Z97 Anniversary board and a Radeon R5 220 board, which seems to be identifying as a Radeon 5xxx chip.  Because I'm using a Haswell-based Celeron, I have to use Clover to inject a fake CPU ID.  I was able to enter the installation fine by injecting one of the hardware ID's in AMD5000Controller.kext; this caused the card to be recognized correctly.  However, post-installation, at boot I am met with a black screen with a beach ball.  If I disable the fake GPU ID, then the system boots, but with no acceleration, locked at 720p.  How do I get the system to boot with the correct drivers?

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