Apple does the drivers themselves and they are released with the OS updates. I believe the last big update that Apple done was mostly drivers and improved OpenGL. Nevermind, I see your OS now. I was going to say it was because of the OpenGL preview because Daz|Studio does the same thing. Turn up the lights so you can see and you end up flooding your render when you are done. Sorry I could not be of any help. I purchased Poser6 for my PC and not my Mac so I cannot see if it does the same for me, that and I have not recieved it yet. I think it may be you video card though. The MX lines are not that great and I know it is almost imposible to find a Mac video card for a descent price. I have a whole rant on Mac video cards if you ever want to hear it sometime. Hope someone can help you out, maybe a PC user that has a similar card on hand or installed.