i have a tower and ibook, both with airport cards. with jaguar, i had been sharing an internet connection via airport with no problems. then came the security update (9-20). After i did that, i can still connect one computer to another via airport (share files), but I can no longer surf the web with the ibook. this is weird. i go to "internet connect" and it shows i am connected to the airport network with a strong signal.... but in status it says "Not Available" Any ideas? Thanks, buffsldr edit........ dont you hate people who answer their own questions? I do. I solved the problem. The tower was updated to security 9-20 and this is when it all stopped working. when i upgraded and restarted, thought not required, the airport was working.