Macbook Volume Control Not Working When I press the volume button (F11 and F12) nothing happens.  Also the mute button (F10) doesn't work.  I tried resetting my computer. Plugging in and out my headphones. Nothing worked.
This happens to me all the time.  I often switch audio device's for pro audio, but it also happens other times using different applications.


Open Terminal (Utilities)
Enter "killall coreaudiod"
Enter your user/admin password


Your volume controls should be working now.  I've reset my NVRAM and PRAM, as well as repaired disk permissions, yet still have to do this quite often.

** Running this command while playing audio/visual via web browser has caused the command not to work and/or the browser crashing, most of the time it doesn't though.