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Level 2

330 points

10.9.2 update borked Radeon 7950 GPU (Display Port - DVI is OK)

I have a 2009 dual quad core Mac Pro (4.1) with an upgraded Radeon 7950 GPU. I use a 30" Apple Cinema display (DVI) and a 27" LED Cinema Display (Display Port). After updating to 10.9.2, the Mac would not boot, but went on a continuous re-boot cycle every 5-10 minutes without a flicker of life in either display. I unplugged both displays and the Mac booted. I could log in remotely from my laptop. I then attached the 30" Cinema Display into the DVI port and the Mac booted normally.

Not sure if Radeon or Apple will (hopefully) fix this issue at some point (I assume the drivers come from Apple in an OS update?).

I recently decided to upgrade my old Mac rather than buy a new "trash can" Mac, but now I wonder if that was a good decision. Now, I hate to put out a huge amount of cash for the new Mac, wait two months, only to find out the Radeon 7950 issue is resolved.

Any comments or suggestions?

Dave

Posted on Feb 28, 2014 9:41 AM

18 replies

Mafet

Level 1

0 points

Mar 1, 2014 2:33 PM in response to David Strait

At first, sorry for google translate.

Applied workaround. Ripped from the original image OSX 10.9 drivers, rolled several files that my ( and some commentaries in forums ) think may be related to the problem - it worked .All kernel modules you can download from this url (drivers of the original image of OSX 10.9): http://www.mafet.ru/Extensions_OSX10_9.tgzUtility Kext Utility for easy and correct recovery of drivers:http://cvad-mac.narod.ru/index/0-4To restore function , guided by the following idea . Many drivers , but not all are used . Video at me from AMD, respectively, in the console : kextstat | grep AMDLook what drivers are actually involved . It turns out that :AMD6000Controller, AMDFramebuffer, AMDSupport.Take kext-s from 10.9 and drag the utility Kext Utility.Reboot and everything - everything works. I personally it helped.