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iMac 27-inch, Late 2009 boots to grey screen

329 Views 4 Replies Latest reply: Dec 10, 2012 3:39 PM by Xlim17 RSS
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Dec 9, 2012 6:13 AM

Hi,

 

I have had this Mac for almost 2 years but recently it has started to freeze up at random times. Upon reboot, it goes to a grey screen and nothing happens. I had to run Disk Utilities > Disk Verification > Disk Permission before I managed to boot it up normally.

 

From this forum, I tried installing smcFanControl and that worked for a while but the last time it froze while I was watching a DVD and that was that. Even running disk utilities was pointness. It just will not boot. The only way to run the machine was in safe mode.

 

Anyone has any ideas? I read about a lot of problems some people were habing with the ATI HD 4850 card. This machine happens to have one.

 

Chris

iMac, OS X Mountain Lion (10.8.2)

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