Mid-2011 iMac Glitches

[monaarts]

Hi all,

I wanted to see if anyone else was having the same issues I'm having. Ever since upgrading to Yosemite I occasionally see "glitch boxes" throughout the screen (something similar to the screenshot posted, just not windows. haha) Sometimes it is there and sometimes it isn't. It's really agrevating!

Anyone else seeing this?

 

[uberjason]

Same issue on Mid 2010 iMac 27in.

Did it in all the beta's, and now in Release. I can change the desktop background or switch to dashboard and it cleans it up, but the "artifacting" returns. It appears to be hardware related, however upon going back to OS X 10.9 Mavericks the issue disappears. Upgrading to Release 10.10 or doing full install of 10.10 and the artifacting returns. It must be something with core graphics.

-Uberjason