How can I tell if I have an airport card installed? My son and I both have old ibooks. I took his into the shop after it froze, they installed a new operating system, OS X 10.3.5. After we brought it home, it wouldn't connect to our wireless router. I can run my 'puter side by side with his and I've check everything in the internet connect window. The only difference I can see, it that when I click on my internet connect icon, it says, Airport: on; Turn Airport Off; Linksys; Other; create network; open network connect. His says the same thing EXCEPT it doesn't have the linksys (which is our router brand). I don't see how to add Linksys or make his computer recognize it. Any suggestions? I've been trying to correct this for days. I even added a new user to his computer and that didn't work either. BLESS YOU FOR YOUR HELP!