Hello tonyfolks ! i've just read that the next OSX update 10.8.3 should feature AMD Radeon 7XXX support, i don't know if this was posted before (i didn't find anything here). here's a link to an article about it : (in french sorry) http://www.macg.co/news/voir/257978/os-x-10.8.3-prend-en-charge-les-cartes-amd-radeon-hd-7xxx google translate : The first beta of OS X 10.8.3 contains drivers for AMD Radeon HD 7xxx cards. Their support for OS X is the germ from 10.7.3. It was hoped that the next generation of machines uses ... you always hope. Engraved in 29 nm and XDR2 Rambus memory using the Radeon HD 7xxx are relatively strong while controlling their consumption. They are particularly suitable for GPGPU applications (using the graphics card as a co-processor for massively parallel processing), which should probably those awaiting updated Mac Pro.