I've had my i7 2010 imac for a little over a year now and has given me no trouble at all. It always detected my wifi network automatically when waking up from sleep. Now all of a sudden the last couple days I have to manually find my network. Not really a big deal since the internet still works great, just strange that it would do this all of a sudden and no matter what "fix" I try to do it doesn't work. My only guess is when I updated to the newest firmware, because it seemed to start right after that.