From
This Guys Blog:
I was trying to get my external microphone working with my MacBook Pro and failing miserably, I googled and found some articles about setting it up in System Preferences and also in the Audio MIDI Setup but nothing I did seemed to work so I figured I would use the AppleCare plan that I paid so much money for and ask a genius!
I got through to a guy on the phone and he didn’t have the slightest clue what he was doing, I had to tell him about the System Preferences with the audio input panel and suggested it might be something to do with that, at which point started to leaf through the manual in front of him, let out a big sigh and said…
“You wouldn’t have this problem if you had a Windows PC, everything would just work”