Internal speakers missing — Maverick Bug!

look in the speaker jack, is there a red light? If so your optical out is engaged

Verify this and report back 😊

yeah, thats not a software malf. but hardware switch

It means your digital audio out has switched on. You can insert a plastic toothpick in the hole and try and switch it off. The switch should be at the 3 o'clock position and go towards the 6 o'clock position. Some people also have had luck inserting their headphone jack and pulling out a few times. Another recent report was that inserting the headphone jack and turning it in the hole helped.

another report:

locate a little tab in the headphone jack which I found in the 9 o'clock position, I put slight pressure on it downward toward the 6 o'clock position

https://discussions.apple.com/thread/3694502

I've had this same problem. Once or twice after tons of jigging with my headphones jack, the speakers have worked. This started for me shortly after updating to Maverick. I suppose it could be a coincidence that the hardware is malfunctioning at the same time as a software update, but my gut says it's something software related.

Try taking (preferably a can of compressed moisture fre air and give it a few blasts, maybe there is some "gunk" that is causing the switch to hang. You can also try blowing into it use a cloth to minimize any moisture, the compressed air is a much better choice.

If no joy, follow Plotinus's advice and bring it in, the microswitch may have failed.

Man Eating Seas wrote:

I agree with you entirely, this is not a hardware problem. I hear the start up sound from the speakers, after it boots into the operating system the digital out comes on...

As you are clear that this is not a hardware issue the obvious route now is to reinstall OS X, a clean re-install will fix it.

Have you tried a pram reset:

Power off, power back up holding the following keys:

OPTION COMMAND P R

Hold these keys till you hear the start chime 3 times, then release, reboot.

There are a couple of things to try, no garuntees, and you should do a back up first. If this don't work OSX reinstall is the path.

You can give this a try.

#1

Close all windows and quit all applications.

Click "Go" menu in the Finder menubar.

Select Computer, then Macintosh HD > Library > Preferences

Open "Audio" folder.

Right click these two files and select "Move to Trash".

com.apple.audio.DevicesSettings.plist

com.apple.audio.SystemSettings.plist

Close the window. Restart the computer

#2

Go to Applications/Utilities/Audio MIDI Setup/Built-In Output/Output and in Format change from the default 2ch-24bit integer to any other format (say, 2ch-32bit float). This should activate the headphone jack. I moved the format back to the original 2ch-24 integer setting and the headphones continued working. So it seems that (for some reason) the original default setting does not recognize a headphone being inserted, but after performing this "resetting" it seems to come to its senses and behave properly from then on

Hey,

I just had this problem and found a VERY simple solution posted on youtube. Basically, do the following:

1.) plug in a set of headphones

2.) go to the sound menu in system preferences

3.) make sure "Headphones" is displayed in the outputs list

4.) return to the system preferences menu

5.) unplug headphones

6.) return to the "Sound" menu and internal speakers should be listed and functioning

If that didn't make too much sense, here is a link to the youtube video I found:

http://www.youtube.com/watch?v=di0JBHa8MiI

Hope that helps

I had the same problem tonight and was able to fix it with headphones as suggested by several others above.

BUT it took several discouraging tries over an hour or two so this is a case where patience and persistence might pay off! It was not an instant fix; it took some fiddling.

I also restarted a few times, reset the PRAM, and tried with a toothpick. I'm not sure if any of that influenced the outcome or not.

Good luck & thanks for the advice!