I bought myself one of these Sapphire Radeon HD 6870s a couple weeks ago for my new hackintosh. When I first booted it using the “GraphicsEnabler”=”Yes” flag in Chameleon, it booted fine and recognized the card as a 6870 in System Profiler but only one monitor worked. I disabled GraphicsEnabler and rebooted, and surprisingly it worked perfectly without any hacks. It shows up as “ATI Radeon 6xxx 1024MB” in System Profiler, but dual monitors are supported and all ports work. Unfortunately I couldn’t get 3 monitors to work, which was the main reason I went with an ATI card over an Nvidia card. That seems to be an issue with either the card itself or the DisplayPort to DVI cable I’m using, not with OS X because it’s the same in Windows 7. I definitely recommend this card if you’re building a hackintosh, it performs well and works right out of the box.