@Kickstart
What I meant about compatible was whether the Mac card is the same as the PC version (besides the flash). My Radeon 7000 had to be a specific type to flash, otherwise you had to re-solder a different chip on it to flash.
Strangedogs used to be a great resource, but it seems like they've gotten rid of all the information. Check the other links provided. If you can find a Mac firmware file and PC flash tool you're most of the way there.
