So here's the deal. I have a PC graphics card in my Mac Pro, an ATI 6870. For those that dont know, when you reboot your Mac, you can't see the grey screen or anything pre-login screen. For those familiar with this, you'll know what I'm talking about. This becomes and issue for stuff like Drive Genius. I've never used it but I have a legal copy of it and wanted to defrag my OSX boot drive. It requires a restart to complete the operation. I click restart, it restarts... It's black, and then it returns me to my login screen. My guess is there is another screen that comes up during the reboot process (That I can't see) that has an option I need to choose but I don't want to blindly press things. Does anyone know what this is so I can possibly blind navigate? I can't find any screenshots or pictures of any sort, and everytime I reboot to defrag it simply returns me to my desktop after a few minutes with the same fragmentation. It's probably a simple "Are you sure you want to perform this defrag operation" with a timer, but I just want to make sure. Any help would be appreciated! Thank you.