I think that's Nvidia, not Apple, tho I did note that too. When you say Fails to work, how did you mean? I managed to get the lasted Duet to build, what a pain. Now I'm going to see if the UEFI64 will build and boot on my C2D. Do you know anything about the irc://irc.osx86.hu/UEFI-Boot project, it seems to be what I'm trying to get done?