DankeSloan Posted March 11, 2011 Share Posted March 11, 2011 I had a perfectly working Snow Leopard installation before I decided to upgrade my 9400GT to a 9600GSO. Now, when I start the computer, I see the Chamelon boot up screen followed by the gray Apple logo, but the screen goes dark after that. Presumably this happens because OS X still thinks that there is a 9400GT in my computer. What can I do about this? I can put the 9400GT back in in order to get back into OS X, but I would like to be able to use the 9600GSO without reinstalling from scratch if possible. Quote Link to comment Share on other sites More sharing options...
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