I'm trying to fix my wireless internet, I keep getting the "connection timeout" message on my macbook pro. I have tried: Turning the airport on and off Restarting my computer Restarting the router Forgetting the network and re-signing in Using the network diagnostics Clearing the PRAM Deleting files from the system configuration folder under preferences Renewing the DHCP lease Changing the MTU size Checked for and installed all updates None of it has worked. The wireless works fine on 5 other devices I have tested, I have even forgot the network on the other devices just to make sure the password is 100% correct and it is, so the problem is definitely my computer, I can see the network with the wifi, and if I type in a wrong password it will tell me it's wrong, but if I use the right password I just get the "connection timeout" message, if I plug in the ethernet cable I have internet. So everything else works. I even tried connecting to a different wifi, and I got the same "connection timeout" message, and went through all of the above checks with that wifi network too. The 3 yr warranty for my computer expired about two weeks ago, so if any one has any additional ideas of things I can try I'd like to know.