First, launch “Terminal,” either by searching with Spotlight or under Applications > Utilities. You can do this with a simple terminal command. While you could restart your computer to fix this issue, another option is to kill the Core Audio service that is responsible for audio processing in macOS. If you have issues with your sound and you’re still running Mavericks, upgrading your Mac to a newer version of its operating system is a good idea. Fix Crackling or Garbled Sound By Killing Core AudioĬrackling or stuttering audio is a problem that plagued many around the launch of OS X 10.9 “Mavericks” in late 2013. Unfortunately, it’s pretty inconvenient, but it’s not the only way of fixing some issues.

Restarting your machine will likely fix many issues, including crackling or stuttering audio. This seems like a bit of a heavy-handed fix, but sometimes you really do need to turn it off and on again. If you’ve tried adjusting your Sound settings to no avail, restarting your Mac is probably worth a shot. You might want to try resetting your NVRAM/PRAM to solve this issue, otherwise create a backup with Time Machine and then reinstall macOS and try again. If you don’t see any output devices at all, you might have encountered a problem when updating or upgrading macOS. Some sound issues can even be fixed by selecting a different output, then selecting the original output. If you would rather output to another device like an audio interface, headphones, or aggregate device, you can specify that under these settings. Now, test your output settings again by playing some music or an audio file. If something other than Internal Speakers is selected (and you have no reason for that to be the case), then click on Internal Speakers to reroute the audio. You should see a list of devices that you can use as sound outputs, with the default option (on most Mac computers) being Internal Speakers. Check the volume slider at the bottom, and uncheck the “Mute” box if necessary. Click on the “Output” tab and take a look at where your audio is being routed. The first place to check if you are having audio problems is macOS Sound preferences. No Audio on Your Mac? Check Sound Preferences

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