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Old Dec 12, 2011, 10:24 PM   #1
randomuser1
macrumors newbie
 
Join Date: Dec 2011
Unhappy My macbook sound isn't working! Help please!

Hi! My Macbook Pro's sound suddenly stopped working earlier today. I was on YouTube and the sound was working perfectly fine, but when I went to another video the sound stopped working. I thought it may have just been the video itself so I clicked on another video. Again, no sound. I unplugged my ear buds and turned the volume up. No sound. I went to iTunes and tried to play some music. No sound. I thought that maybe my computer was too outdated so I did a software update and restarted my computer a few times. Each time I restarted the welcome sound DID appear. I don't know what's wrong! Does anybody know what's wrong and what I can do to fix it? That would be great. Thanks.
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Old Dec 12, 2011, 10:26 PM   #2
GGJstudios
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Join Date: May 2008
What does it show in System Preferences > Sound > Output?

If you can’t hear sound from your speakers
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Old Dec 13, 2011, 12:55 AM   #3
nicklad
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Join Date: Jun 2007
Location: Nottingham, UK
I've regularly had to do a...

sudo kill -9 `ps ax|grep 'coreaudio[a-z]' |awk '{print $1}'`

... in the terminal after watching YouTube videos under Lion because the entire audio subsystem fails.

A reboot works just as well, of course, but is significantly more distruptive.
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