orangejedi829 posted a question in OS X Mavericks 10.9Hi, I just did a fresh install of Niresh 10.9. After installation, I had to use the 'grafix backup all' command to boot to the desktop. I then installed nVidia drivers from nVidia, and everything seemed to work fine. However, I'm getting strange graphical glitches across the OS. Programs like iMovie and iPhoto are unusable: Other aspects of the OS are affected as well: and the screensavers 'Arabesque' and 'Shell' have the same issue: This occurs with nVidia drivers disabled as well, and also in safe mode. I don't really know what to think. Maybe it's a Quartz issue? Both of those screensavers are Quartz-made, I'm pretty sure. I'm not sure what to do, any suggestions? Thanks!