Hi, To install the PC ATI 6870 in my Mac Pro, do I need anything other than the kexts that netkas.org describes in its latest post? Are there any hardware snags I have to get through to install it in the PCI slot, or is it just like installing a GT120. I have the early 2009 MP model. Which brand of 6870 works best, or do they all work fine (sapphire, HIS, etc). Thanks.