I have an old Power Mac G5 WITHOUT wireless capability. Just bought a Belkin F7D2101 Surf & Share Wireless USB Adapter. But I can't seem to find a driver for Mac. Is there a solution?

I talked to Belkin some time ago. They're good people.
www.belkin.com/contact

http://www.belkin.com/us/support-article?rnId=3784

for the above product here:

Belkin : Support F7D2101 Surf & Share Wireless USB Adapter ...

You need wireless router for your usb adapter if you want to share your internet connection. Just an example if you have 2 laptop which dont have wireless adapters then you need 2 usb wireless adapters.

try that usb on other computer, if the same error then your USB AP is dead

If it is the
F7D2101 Surf & Share Wireless USB Adapter It only works with Windows OS. If this number is incorrect, please provide the complete model and serial number of the device.
Thanks

Belkin UBS adaptor in not compatible with Ubuntu.

techbelkin for remote assistance skype techbelkin

Go Belkin : Support : Setup Assistant for Routers and start a new configuration.

Hi, let me know the operating system of your laptop or desktop that you're using (it's very
important for compatibility) and also the service pack that's running your PC. If you don't
install the adapter properly, the problem will occur repeatedly. Remember, running the
driver without plug in USB.

They have the driver/software file on the belkin website, www.belkin.com