Ask Jacob

For the most part, any computer with a G4 350 MHz or G3 500 HMz processor or higher, but with speeds at or below below 900 MHz will take a original Airport card (Used Airport Card). Also, most Macs with a 1 GHz or faster processor will take an Airport Extreme card (Airport Extreme Card). The Mirrored Drive Door G4 (MDD G4) is the exception to these rules. For the MDD G4 you need to know if it has FireWire 800. If it has FireWire 800 it will take an Airport Extreme card, and if it does not have FireWire 800 then you have to use an original Airport card. There are a few other exceptions to the rules but this will take care of 99 percent of the Macs out there.