Is there a way to use a third-party “AirPort” (802.11b) PC card with a Mac notebook running MacOS 9?
Certainly. Although some third-party wireless cards may have their own MacOS 9 drivers, IOXperts sells a driver that makes it possible to use dozens of third-party wireless (802.11b) cards with a PowerBook 2400, PowerBook 3400, PowerBook G3, or PowerBook G4 capable of booting MacOS 9. The Mac notebook must have PC card slots, so MacOS 9 capable iBook models are not compatible. The driver costs US$19.95 and a free trial is available to ensure that the driver works properly with your PC card prior to purchase. A MacOS X driver also is available to expand the number of available wireless options for MacOS X capable systems.