I recently had a new roomate move in, he has an Imac, we are having a difficult time connecting it to my wireless network. It sees the network, but will not connect. I removed my network security thinking that might be a problem, but still no luck. The Imac self assigns an ip address of 169.something. I tried manually setting the ip address, the airport window says connected to the n etwork and lists the ip I nassigned, but it still won't connect to the internet.Meanwhile my PC stays connected and works fine. I don’t know much about Imacs, so any help would be greatly appreciated.