Sound does not work after sleep

SMC RESET

Shut down the computer.

Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.

On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.

Release all the keys and the power button at the same time.

Press the power button to turn on the computer.

PRAM RESET

Shut down the computer.

Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step

Turn on the computer.

Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.

Hold the keys down until the computer restarts and you hear the startup sound for the second time.

Release the keys.

Finder

Close all windows and quit all applications.

Click "Go" menu in the Finder menubar.

Select Computer, t hen 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 windows. Restart the computer.

I have a Mac Mini (Late 2012) and I have this same exact problem. It only seems to have cropped up in the last few days, I think around the time that 10.8.5 was rolled out?

It's only the HDMI sound that seems to be affected. Rebooting is the only thing that seems to resurrect the sound on HDMI.

Have tried the above advice as well as other general advice for restarting coreaudio, all to no avail.

This problem cropped up with 10.8.5 but there seems to be a long history of the problem.

The 'quick fix' is to ise a Mini Display Pot (& Thunderbolt) to HDMI adapter. This gets round the problem.

Hi Scott,

Is the sound muted or the volume turned down? Nevermind, you had to restart. On my computer, the sound is just muted sometimes after sleep so I just unmute it.

kel

I read that Apple has submitted an OS X upgrade to its developers which addresses this problem. It should be fixed in the next week or two.

No solution yet but just an extra piece of the puzzle - on my MacBook Air this exact problem seems to happen after I've been using Airplay to my AppleTV. I still get system sounds (clicks, volume uo and down sounds) but no audio coming from YouTube or anything else coming from a browser - Chrome or Safari.

Also had the same problem here. Macbook Pro late 2013. Do you guys have parallel desktop installed? My Macbook pro works perfectly fine untill I install flash player in Parallel Desktop (windows 7 in Parallel). After uninstalling the flash player plugin in Parallel the sound problem goes away. Disabling the flash player plugin in chrome://plugins also works for me too.

Can you guys try diabling the flash plugin to see if it can solve your problem? I find that there is a bug report on the same issue in the Chrome issue tracker as well: https://code.google.com/p/chromium/issues/detail?id=160920

I'm having the same issue. On black friday I bought a mac book pro 15 retina display it worked well until two days ago when i shut the lid laptop goes to sleep but than when I open the lit the sound just won't work. I tried using a iphone wired headphone and, a bluetooth headset both did not work so i have to restart everytime when the laptop wakes up. All software are up to date. Any solution to this annoying problem?

thank you in advance for your help and time

Have noticed this recently.

To fix, here, simply changing the volume (using media keys) seems to wake up the audio.

WIll try PRAM reset on next reboot (might be awhile! haha)