Go to: http://www.wwc.edu/~frohro/Cardbus/Cardbus.html About 1/4 of the way down the page you'll see, "How do I make my Powerbook 3400c to be cardbus compliant" Download: "USB Card Support 1.4.1" It is supposed to be hacked so it will install on any Mac. Worth a try anyway. Dean Clark Martin wrote: > At 9:56 AM -0500 12/4/03, Dijkwel at aol.com wrote: > >> To my card-bus enabled but otherwise stock 2400c running 8.6, I would >> like to add USB capabilities through a Macally USB card. However, >> when I try to install Apple's USB adapter card support, version >> 1.4.1, the message <"USB adapter card support" is not supported on >> this machine> shows up on the screen. I'd appreciate some advice on >> how to proceed (for instance whther there is another version >> available that does work on the 2400c or whether I should run OS9. > > > > Silly question, did you have the card inserted when you ran the installer?