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I downloaded Mountain Lion OSX three days ago.  On start-up my IMac shows a black DOS screen.  Must unplug the Mac to restart.  Please help!

5988 Views 46 Replies Latest reply: Nov 27, 2012 12:01 PM by Eric Root RSS
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garet245 Calculating status...
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Jul 29, 2012 8:23 AM

I downloaded OSX Mountain Lion three days ago.  On startu my IMac shows a black DOS Screen. I must hard boot and it works.  Does anyone have the same problem?

iMac, OS X Mountain Lion
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