Hi guys, I could use some help. I have a Retina Macbook Pro, which I purchased a month ago. It is running Mountain Lion. I am not really sure how to explain this... in the last couple of days, when I open certain demanding applications (Photoshop, Illustrator, but also iPhoto), my Finder, my menus and even the Dock popups are affected by some kind of weird pixel anomaly (see attached screenshot). This affects all menus, not only the ones of the app that started it. The pixels don't move while the menu is open, but they change location if I open it again. Apart from that everything works fine and the problem disappears as soon as I close the demanding app. Now, I tried the following: start in safe mode reset the pram smc reset • create a Test Admin account and the problem seems to affect the whole system, not only my account reinstall the OS go through a complete diagnostic test and all hardware seems to be fine tested memory with Rember and everything seems to be fine Everything seems to have started after I enabled the access for assistive devices to play Civilization V o Steam (of course I disabled that now, and even uninstalled Civ V and Steam). I contacted Apple Support and they are at a loss. They recommended either to bring the laptop into assistance or to do a complete erase and reinstall of the OS from scratch (that's what they would do and I could do it myself at this point). That is, since the problem doesn't seem to be hardware related. Now, the only clue I have apart from the Steam thing (that could be completely unrelated, since I noticed the problem only the day after), is that This issue disappears while starting in safe mode. Could the problem be related to a corrupted kext file that is being loaded or something else that doesn't happen when I start in safe mode but does when I start normally? Going through a complete reinstall it's kinda of a drastic step (also, I wouldn't want to use a Timemachine backup, since the problem could be carried together with the backup itself - so I should restore everything manually). Do you have any suggestions/desperate things I could try?