Reset the audio system in OS X

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The Core Audio in OS X is responsible for the system being able to process different sources, MIDI and the audio inputs and outputs in addition to other capabilities through a centralized structure that allows you to easily access the programs and services of the system.

Normally to configure these options we will have different ways that go through accessing the menu > System Preferences> Sound or Utilities> Audio MIDI Configuration or the settings of specific programs such as GarageBand, however if an error occurs such as blurry sound, a unexpected audio loop or just that do not reproduce anything Due to the system not recognizing the device, there are different ways to fix it.

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Always the first thing before delving a little more into the problem is to check that everything is working as it should and that it is indeed a problem of the specific application and not of the system, with which possibly the reinstallation of said program can solve the problem. If this does not work, you could check if everything else is correctly configured on the system to make it work, features like bit rate or output device.

On the other hand, if all of the above did not solve the problem, perhaps we can restart the daemon that controls the audio, Coreaudiod, which is the one that really handles the entire audio system, so simply by opening a terminal and inserting the following code we can achieve it:

sudo killall coreaudiod

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This process is loaded by another daemon named launchd which will instantly relaunch coreaudiod so it will have been reinitialized. Finally, if this does not have an effect, we should restart the system completely or pose a hardware problem in sound.

More information - How to see which apps use location data in OS X


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  1.   Pablo Morales said

    GENIO before I had to restart my mac

  2.   Judy Ramos said

    Hi Thanks for the code it worked for me. Perfect thank you thank you.

    1.    maialen said

      The password that you have to put is that of your mac user.

  3.   Christian said

    Dear I need help, I cannot configure my macbook air with the midi interface that is a USB one, the macbook air does not recognize it

  4.   Cesar Montano said

    It asks me for a password

    1.    Benito Licona said

      You were able to solve the pass, because the same thing appears to me.

  5.   Israel said

    good afternoon and apply the code but it asks for password ????

  6.   George said

    Hello, good afternoon, I have a problem with a Macbook Air, the sound stopped working when I put in some headphones, now no output device appears, and I have already tried many alternatives, can someone help me? when I turn up the volume, the sound icon appears with a circle crossed by a line

  7.   Javier said

    it asks me for a password

  8.   Andrew said

    Hi. The audio does not work for me, although for the mac everything is perfect ...
    Neither headphones nor speakers ... But if I connect headphones via USB, they do work ... how can I solve it so that it works normally again? please thanks

    1.    Adolfo said

      My Mac starts working fine but from time to time the sound starts shaking for a few seconds then it continues fine but after a few minutes the failure repeats

    2.    Adolfo said

      My Mac starts working fine but from time to time the sound starts shaking for a few seconds then it continues fine but after a few minutes the failure repeats

  9.   Dani padilla said

    It helped me a lot I fixed my mac thanks

  10.   ink block said

    It worked! You are a crack!

  11.   Jesus G. said

    I had problems with a wireless headset and thanks to this it has been solved. Thank you.

  12.   Carlos said

    works for macOS catalina?

  13.   Grover tapia said

    Fantastic, very good help, it helped me to solve my external audio output problem (Headphones). Thank you.

  14.   Kary said

    Thanks friend! This command has fixed my problem. I had a problem for a long time to be able to listen from the headphones that I have connected to the external audio interface. Although everything was perfectly configured in the DAW and the «Audio Midi Configuration».

  15.   ramiro said

    Thanks, with the code it was solved, hug