The Apple Mac Pro is aimed at a market of high power computing where the use of a computer exceeds basic gaming or work use. The Mac Pro uses fully buffered FB-Dimm's for it's RAM needs, of which Corsair has just released a special Mac Pro compatible series. The 2x1GB (2GB) or 2x2GB (4GB) kits are rated at DDR2-667 (PC2-5300) and should retail for $165 (2GB kit) and $225 (4GB kit). These sets have been verified 100% Apple compatible by the Apple Test Labs in Californi and offer the same lifetime warranty that all Corsair memory products have.