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This is the weirdest thing. I have an MBP 9,2 (10.12.3). I detached my headphones, closed the lid and then opened it again after 1h or so. Now I cannot change the system volume, here's what I see:

enter image description here

So I thought maybe this is the old problem where the computer does not realise the headphones have been plugged out, but inserting and detaching them again does not help. However, the red light inside the port is on, as in the case of the aforementioned bug. The strange part is that in the Sound Preferences, I now see this:

enter image description here

there used to be an item Internal Speakers and clearly, the laptop doesn't have optical sound output.

Can anyone suggest what the cause and fix might be?

What I've tried:

  • Rebooting (didn't help)
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  • This is probably a dupe, though idk the macbook models well enough - see apple.stackexchange.com/questions/261282/…
    – Tetsujin
    Commented Mar 28, 2017 at 12:12
  • I can't thank you enough. I was preparing myself for a long, long time on the phone with a tech. I plugged in a set of headphones and the sound just reappeared. You are wonderful!
    – AndreaBHI
    Commented Oct 6, 2018 at 15:46

2 Answers 2

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You may be able to troubleshoot this by opening "Audio MIDI Setup" from /Applications/Utilities/Audio MIDI Setup.app, then you should be able to add devices from this location. I suspect that somehow, the Built In Output is removed from the list, and the little + sign in the bottom corner may be able to add the support for the device again.

Best of luck!

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  • Thank you. I've been trying to resolve this for so long.
    – Kai
    Commented May 17, 2017 at 11:55
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Strangely, rebooting does nothing, but inserting and detaching the headphones multiple times has fixed the problem.

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  • Hi, and welcome to Ask Different, it seems as though you havent answered the question, and this should be a comment. Best of luck!
    – bret7600
    Commented Mar 28, 2017 at 16:39
  • @bret7600 Please re-read my answer.
    – oarfish
    Commented Mar 28, 2017 at 17:19
  • Oops! my Bad! so sorry!
    – bret7600
    Commented Mar 28, 2017 at 19:25

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