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I primarily use my Mac for iOS development, so I rarely use audio and I commonly have it turned of to not disturb my co-workers. Therefore I'm not really sure when it stopped working.

Anyway, today I wanted to play a song, but I got no audio. I rebooted the Mac and still nothing. I rebooted again and noticed that the boot sound played, but once I entered OS X I couldn't get any sound to play.

What's up with that?

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What appears under output devices on the output tab in sound preferences? – Graham May 25 '11 at 15:56
    
Well, it works now, but there's something called Soundflower (2ch) and Soundflower (16ch) in addition to the built in speakers. I suppose the problem might have been that one of those were selected as output device. – Erik B May 25 '11 at 16:10
1  
Soundflower is an internal audio routing system that is VERY 3rd party. You must have installed it separately, and that absolutely could have been your problem. – NReilingh May 25 '11 at 16:16
    
@NReilingh seems like something Plex installed. – Erik B May 25 '11 at 16:19
up vote 2 down vote accepted

I connected and disconnected my headphones and now I have audio again.

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This still happens on brand new Macs? Anyway, don't forget to accept this answer even though you posted it yourself. – user495470 May 25 '11 at 16:19
    
@Lri I know, but I can't accept it for another two days. – Erik B May 25 '11 at 16:25

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