Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

MBP[Mid 2012] com.apple.driver.AudioAUUC isn't loading

Suddenly, few days ago my sound button grayed out. I don't have any idea why that's happened. As everything was working normal.


  • System can not find internal speaker and microphone. But, when i install Soundflower there was no sound but volume icon wasn't grayed out.User uploaded file
  • After do some research, I found AudioAUUC.kext isn't loading by itself. But, it's still in /System/Library/Extensions folder.User uploaded file
  • So, I tried to load that kext manually by sudo kextload /System/Library/Extensions/AudioAUUC.kext/. After that, I checked where it is loading or not by this way kextstat > ~/Desktop/kexts.txt. I found both com.apple.iokit.IOAudioFamily com.apple.driver.AudioAUUC in that file. But, sound isn't working and as I removed Soundflower. So, volume button was grayed.
  • PRAM and SMC didn't worked.
  • Then, I restart and opened Activity monitor. I found com.apple.audio.sandboxhelper is missing.

User uploaded file

I also tried to load and unload Apple High Definition Audio (HDA)AppleHDA.kext. But, while loading this error are showing


1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line 1280

1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line 1580

1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line

1073 1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line 1073


Now, what is the problem here? How can I solve it?

MacBook Pro (13-inch Mid 2012)

Posted on Jan 25, 2015 4:38 AM

Reply
1 reply
Sort By: 

MBP[Mid 2012] com.apple.driver.AudioAUUC isn't loading

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.