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Suddenly No Sound On iMac

B

BILLDORGAN

macrumors newbie
Original poster
Dec 15, 2009
3
0
I am using a 27-inch late 2009 iMAC:

Processor 2.8 GHz Intel Core i7
Memory 16 GB 1067 MHz DDR3
Graphics ATI Radeon HD 4850 512 MB
Software OS X 10.8.3 (12D78)

Suddenly, today there is no sound.

When I click Systems Preferences > Sound > Output there is only one device: Apple TV, Type: Airplay. There should be a device for Internal speakers but it does not appear.

When I click Systems Preferences > Sound > Input there is no device found.

When I click Systems Preferences > Sound > Sound Effects all the alert sounds are greyed out.

I want to hear the sound on my computer.

How do I get the device in-Built Speakers to appear in Systems Preferences > Sound > Output?
 
SOLUTION TO SUDDENLY NO SOUND ON iMAC

:D

Here is the solution to my problem:


Mac desktops (Mac Pro, iMac, Mac mini):

Shut down your Mac.

Unplug your Mac's power cord.

Press and hold the Mac's power button for 15 seconds.

Release the power button.

Reconnect your Mac's power cord.

Wait five seconds.

Start your Mac by pressing the power button.

Here is the link:

http://macs.about.com/od/usingyourm...-System-Management-Controller-On-Your-Mac.htm
 
That totally worked for me! Although all my settings in sound preferences were sorrect, It still didn't play sound from speakers, only headphones. I did as above, turned off computer unplugged 15 seconds, pressed start 15 seconds. Waited and plugged back in. Perfect. Thank you.
 
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