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Mac OS Sierra: How To Fix Sound Not Working Problem

If you own a Mac, you might have recently upgraded to the Mac OS Sierra. Many users have complained about volume difficulties on the new system.

If you are having the same issue, here we offer a guide that can show you step by step, how to adjust the settings so that the sounds work perfectly.


These are just some of the common issues that have been reported with the new OS Sierra.

  1. A popping noise is created when playing video or audio.
  2. Audio works on all programs apart from Safari.
  3. The volume for speakers is not available.
  4. No audio on a range of browsers after the latest update.


Here are some possible solutions to these problems. Follow the steps of each one to see if they help.


Restart the computer

Try restarting your iMac, MacBook Air, Macbook Pro, or MacBook Pro using the Retina Display function.


Adjust Output Source

OS Sierra can tend to change the sound output from the default setting to different speakers. If have a device which is attached to your computer that features speakers, Your Mac will want to make that the output device.

  1. Find System Preferences
  2. Find Sound
  3. Swap the audio device back to Internal Speakers.


Alter System Preferences

  1. Find System Preferences
  2. Select Sound.
  3. Then tap the “Play Feedback when volume is changed”.
  4. Also try ticking “Show volume in menu bar”.


Terminal Command

You can try running the terminal and entering:

sudo killall coreaudiod


Alter Internal Speaker Settings

  1. Open Settings.
  2. Find Audio.
  3. Go to Output.
  4. Change the setting for the internal speaker.


Try a Bootable USB Drive

  1. Backup the files on your computer.
  2. Then create a bootable OS Sierra drive on a USB.
  3. Re-install OS Sierra using the drive.


Change Audio Port Settings

  1. Open System Preferences
  2. Go to sound.
  3. Change the setting from HDMI to use a Headphone port.


Restart Apple System with PRAM

  1. Shutdown the Mac.
  2. Switch the Mac back on.
  3. Hold Option-Command-P-R keys combined before the gray screen has a chance to appear.
  4. Hold the keys until the computer restarts.


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