Probably only supports 64-bit efi Mac pros though...

Our cards aren't compatible with the Mac Pro?

The bios aren't for the efi that apple uses for their macs, it'll work under a windows environment in a Mac Pro, but that's it. You can flash some cards, but it's picky on what card you use. Netkas in the Mac community is big on this, don't have a link to it but check his site out. Or people use chameleon to boot the cards up.

If you want this in your mac make sure you buy a tube of lube first. 1000$ upgrade.

First and only warning. We aren't starting a flame fest here. Besides, this isn't apple pricing it either.