Wifi only works in Apple Store!?
After a replaced display in the Apple Store the wifi has been crippled on every network except - of course - Apple's.
The networks include 3 different homes, an iCafe and a University network.
Apple ruled out a software problem because they performed a full system Erase and reinstall of Mountain Lion. And they ruled out a hardware problem simply because the wifi flies in their Store!
I have a 100mbps router so my wifi and the others are not just slow. Something is up!
I want to just replace the wifi card! Is it possible it could fix it!?