I was hoping somebody might know what's going on with this, I've taken it into a repair shop and they couldn't replicate it. My mid 2011 27" iMac is connected to the wifi but keeps dropping internet signal, sometimes every few minutes, sometimes a little longer. It's not the Airport or the internet itself because my laptop stays connected just fine. If I turn the wifi off on the iMac and then back on, it immediately connects for a few minutes before losing the signal again. Hopefully I've explained this well, I've never heard of this before. Thanks for any help you can give!