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This happened today when at work I plugged in an external speakers jack, speakers were playing, everything was OK. But after I took the jack off, I couldn't hear any sound from the Mac speakers. It seems like disabled. So now I only can listen music through headphones or external speakers but not Mac speakers.

Here are a few screenshots:

Headphones jack in:

Top Menu Icon:

Jack In

When I press the increase sound button on the keyboard:

Jack In

Sound Settings:

Jack In

Headphones jack out:

Top Menu Icon:

(image not available anymore)

When I press the increase sound button on the keyboard:

Jack Out

Sound Settings:

Jack Out

If you had a similar situation or you know how to solve this, please do not hesitate and help me ;)

BTW, I've tried to repair permissions and restart the Mac (a few times), this didn't help.

  • That last sentence... "Did you try turning it off and turning it on again?" :-D – Shiki Jun 10 '10 at 18:09
  • yes, i have tried this :D as well. – Lukas Šalkauskas Jun 10 '10 at 18:20
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This happens when your Mac thinks that a mini-TOSLINK device is plugged into the jack. (If you look, you'll be able to see a glowing red light inside). The volume can't be adjusted by the computer with digital audio, which is why you are unable to adjust it. If a restart doesn't help, it could be that there is excessive dust or dirt inside the speaker jack. Try cleaning it out with some compressed air; it's helped me many times in the past.

  • yes I see the red light inside of it. Ok I will try to clean it out, let you know if it helped. – Lukas Šalkauskas Jun 10 '10 at 18:28
  • Yes it fixed the problem!!!! than you very much dude ;) – Lukas Šalkauskas Jun 10 '10 at 18:30
  • Im embarrassed always when I see him answering questions I dont have an idea of. Guess you'll be a good IT expert purple. :) – Shiki Jun 10 '10 at 18:33
  • 's what I'm here for, @Lukas! And thanks @Shiki, I most certainly hope to be one day! – squircle Jun 10 '10 at 19:19

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