Audio & Sound Not Working in Mac OS X? It’s an Easy Fix
A few Mac users that update to Mac OS X discover their sound and audio output has ceased to work, leading to a completely mute Mac that does not respond to the volume keys. Fortunately, the mysterious missing sound output issue is incredibly simple to fix, and there is nothing actually wrong with the Mac.
Here’s how to quickly fix the missing audio output on a Mac. And yes, this applies to all Macs with all forms of speakers; internal, external, headphones, earbuds, etc:
- Head to the Apple menu and choose “System Preferences”, then select the “Sound” panel
- Choose the “Output” tab
- Select “Internal Speakers” as the output device*
- Adjust the sound as usual, it will now work as intended
* If you have external speakers or headphones hooked up, you’d want to select those instead. Do note that you may need to first choose “Internal Speakers” and then select the external speaker or headphones to get the audio output to work again as intended.
Why does this happen? It’s probably a simple bug where a different audio output channel gets selected or chosen during the installation or update process. This seems to happen most often with Macs that have used HDMI output to a display or TV which has speakers. Interestingly enough, the reverse situation also can occur, where a Mac is connected to a TV and there is seemingly no audio output, at least until HDMI has been selected as the proper sound output channel.
This was first reported a while back by early adopters using beta releases, but it still seems to randomly happen even with installing the latest releases of OS X Yosemite on a wide variety of Macs. Occasionally, the same situation occurs randomly after installing an update to OS X 10.10.x as well. Just remember if you experience this, it’s no cause for panic, it’s a simple fix.
Thanks to Kerry for the tip suggestion.