Currently Being ModeratedNov 13, 2012 2:35 AM (in response to iPingu)
I have the same problem.
I have the problem wired! The connection works fine on PC and Xbox but iMac doesn't connect. It says "Cable unplugged". Router is running well and I have tried each port to open the connection to Xbox and PC and they all work. I tried switching the cables if it was broken. Nothing seems to help.