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Q: intermittent flickering checkerboard pattern on 27" imac desktop.

I've been having an intermittent flickering color checkerboard pattern on my 27" iMac. Sometime the little boxes are in a square or rectangle pattern. Other times it is randomly around the screen. Sometimes it is static, but usually it is flashing. I think it is only on the desktop, not on apps, but I'm not positive about that. I've tried upgrading to OS X 10.10.2 with no change. Any idea what's causing that and what I can do about it?Screen Shot 2015-03-02 at 6.04.09 PM.png

iMac, OS X Yosemite (10.10.2), null

Posted on Mar 3, 2015 6:10 AM

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Q: intermittent flickering checkerboard pattern on 27" imac desktop.

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