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I have a mid-2012 MacBook Pro Retina, and am using QuietComfort20 headphones that previously used to work.

Now, after a clean install of OS X Yosemite, I'm unable to use the headphones, no audio comes through them at all.

When I adjust the volume use F11 or F12 I get the following

enter image description here

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  • does it show the headset in System Preferences Sound output? – Ruskes Nov 13 '14 at 21:32
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Seems that the Audio Output selector was "Parallels Access Audio". When I used parallels access apparently the default output was changed, and not reverted.

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