Mac OS Sound Problem

Question

Ok, this is strange problem, and I couldn't find any solution for it yet.

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

Here is a few screen-shoots:

Headphones jack in:

Top Menu Icon:

When I press increase sound button on the keyboard:

Sound Settings:

Headphones jack out:

Top Menu Icon:

When I press increase sound button on the keyboard:

Sound Settings:

If you had 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 mac (few times), didn't helped...

Answer 1

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.