Hi, Since the latest update of OSX, I'm encountering trouble with my WiFi connection. My old sony laptop has no problem connecting, so I'm guessing the problem must be with the iMac, and not with the network. When I boot the mac, everything is OK, I get connected. But after a while (less then half an hour) it looses connection to internet. In the airport icon appears a " ! ". To get my mac back on the network, I have to reboot it. It's not a signal problem, my mac always finds the network, but it doesn't connect. My password is asked, I'm sure I entered it wright, but it's asked over and over, no connection possible. I tried changing DHCP to a fix IP, deleting the network and reconnect as if it's a new one, and little stuff like that, nothing helps. Only way is to reboot. Somebody any idea? Greeting from Brussels.