i have colored squares on my screen occasionally like a checkerboard grid Any ides what causes this
MacBook Pro, 2010
Sounds like this:
http://support.apple.com/kb/TS4088?viewlocale=en_US&locale=en_US
You need to get it into the Genius Bar for a free eval. You may or not be covered by the above link, depending on when you bought it. In the meantime, download gfxstatus and force the graphics to Intel. The graphics may not be as fast, but the problem should go away.
gfx.io
Thanks BobRz but i have a 13 inch macbook pro and i am already running mavericks, any other ideas
i will tell you this when i take a screen shot the problem shows on my screen but not when i insert the photo here, i reset the comand option p-r last night several times and it cleared oit up some. I have plugged into an external display and it shows on the external i went to the genuis bar and they were stumped as to what is causing it it s very intermitant sometime when i am editing with aperature or iphoto it shows really bad it first started when i would play video through iphoto but play it with quick time and its gone. Its very strange
JWilly,
I'm not sure what specific model you have, but many have 2 graphics circuits; the onboard Intel, and another discrete graphics card. I sent that link the first time because it sounds like the discrete card is failing. Try this: download gfxstatus from gfx.io and see if you have 2 circuits. If so, force the graphics to Intel. If the problem disappears, it's likely your discrete graphics card.
failing gpu
