MAC OS Unexpectedly Quitting. . .

Posted:
in Current Mac Hardware edited January 2014
I've been having a bit of a problem. From time to time, my computer screen turns dark descending from the top of the screen to the bottom, and an error message pops up saying that I will have to restart my computer. I've run the disk first aid, and it says that no repairs are needed.



Any ideas?



Thank you,

John
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