I found this on ocz/tonymacx86.com, a Revodrive (or apparently Revodrive X2 also, haven't tried that one though) works in OSX by just installing these drivers: http://www.siliconimage.com/support/searchresults.aspx?pid=27&cat=3 (I used the SiI 3124 Mac OS X 10.6 SATARAID5 7/14/2010 18.104.22.168 version) It was super easy and it works wonderful ocz should buy these drivers and sell the old Revo's to us Mac Pro users! ps. I'm using a 2008 mac pro pps. there is some trick to get it to work to boot from the drive, but I haven't tried it. Check on tonymacx86. I'm just using it as a user-drive/games.. Awesome!