A .kext that emulates / replaces EFI for bios based nvidia cards. http://omni.starchaser.org/ quote "For some time np_ and I have suspected that this EFI business is all a smoke-screen and really serves no real purpose except as yet another way to prevent running OS X on PCs, through use of proprietary hardware. You can't blame Apple for doing that, they need to protect their product and market share, but at the same time they have severely limited their users on what can be plugged into the computers. Pre-compiled binary This is my version of the solution, called Titan, distributed as a binary only. Please note that this was only tested in OS X 10.4.8. Put the kext in your /System/Library/Extensions/ folder, correct the premissions (chown/chmod), remove the cached and packed extensions and reboot. If all goes well your computer will still be in one piece after the system boots back up."