Yes, it does. PC 4870's apparently work well, too.... http://forums.macrumors.com/showthread.php?p=16668691#post16668691
Graphics cards in a hackintosh were tough for me, too. I had to really fight to get my GTX285s working, and I thought it was easier now with ML, but maybe not. Here is one person using dual 4870s on 10.8.2. Not sure what mobo you have, maybe this will help.... http://88plug.com/mountain-lion-kakewalk-ga-ud3p-ep45-ati-radeon-hd4870x2 And another thread.... page 32, no less. Got spare time on your hands? Build a Hackintosh http://www.tonymacx86.com/mountain-...ntain-lion-6xxx-gpu-issues-fix-inside-32.html