Fix Sound Not Working on a MacOS

You may or may not encounter audio bugs after updating your operating system when you install a new audio device or even when you switch between applications. Here are a few quick fixes that can help you get your audio working again.

First, make sure you haven’t just muted your system. It may seem silly, but you can potentially save yourself from wasting time on audio troubleshooting by identifying this early. Tap the mute/un-mute button and then increase your volume before testing the audio again. You can also try plugging in headphones (or another 3.5mm jack) and pulling them out again.

Also before trying steps below make sure you are using right audio device, go to the Apple menu and choose System Preferences -> Sound -> Output. Select the correct audio device and make sure it is not muted.

Reset Core Audio

If your audio problems continue, there may be an issue with one of your Mac’s audio interfaces resetting the low-level Mac audio API, Core Audio, often resolves these problems.

  1. Click on the Spotlight search icon and search for “Terminal”.
  2. Launch Terminal and type: sudo killall coreaudiod and the press Enter. Type in your password if asked.
  3. Once you reset the API, test your sound to make sure it’s working properly.


Reset PRAM & SMC

There are many reasons you might want to reset your Mac’s parameter RAM (PRAM) and system management controller (SMC), and they all involve your computer doing weird things. PRAM in particular remembers certain settings related to volume and sound, so resetting that may help smooth things out.

  1. Shut down the computer.
  2. Press the power button.
  3. Before the grey screen appears, press the Command, Option, P, and R keys at the same time.
  4. Hold the keys until your computer restarts and you hear the startup sound a second time.
  5. Release the keys.