This article aims to help you troubleshoot and fix sound problems. More specifically, several Mac users have reported that they are unable to change/adjust sound/volume.
Do you think that your Mac’s volume control is not working?
If you can’t adjust volume, here is how you can fix:
Please complete each step before moving on.
If the audio stops working properly in macOS, the first thing you should do is to go to System Preferences > Sound > Output and check your sound settings. Make sure that your settings are correct.
When you press the volume keys, do you see an image like this:
That also your internal speakers are disabled. You can select a device you want to use in the list of output devices if you have multiple devices. These devices can be headphones plugged into your Mac, external speakers or AirPlay devices.
For example, as you can see below, if the Sharp TV is selected, you will get the volume icon like above if you try to adjust the volume on your Mac. You will have to use the Sharp TV for volume adjustment.
Make sure you have the correct device for your audio selected.
Restart your Mac
Restart your Mac. This may help. (Apple menu > Restart…)
Reset Core Audio
You may want to reset the Core Audio process. Here is how:
Launch Terminal and enter the following command:
sudo killall coreaudiod
Then press enter (you may need to enter your admin password).
You can also do this using Activity Monitor. Here is how:
- Open Activity Monitor on your Mac.
- Type coreaudiod in the search box.
- Select it.
- Click on the X to quit it. This will manually kill the process.
The coreaudiod process should restart itself.
Reset PRAM / NVRAM
Speaker volume information is stored in PRAM (on older Macs) or NVRAM (on newer Intel-based Macs). Resetting this may resolve your problem. Here is how:
- You may want to print these steps, as the process involves turning off your Mac.
- Turn off your Mac (Apple menu > Shut Down…).
- Press the power button to turn on your computer.
- press and hold the Command, Option, P, and R keys at the same time, after you hear the startup sound. Note that it is important you press these keys before the Apple logo appears.
- Keep holding the keys until your Mac restarts.
- When you hear the second startup sound, release the keys.
You may also want to reset SMC.
Update your Mac
Make sure that you are running the latest version of macOS. You can easily update your Mac by going to System Preferences > Software Update. And if there is an update available, follow the onscreen instructions.
If your Mac is running macOS High Sierra or earlier, then open the App Store app on your Mac to update your Mac.
Audio Midi Setup
Launch Spotlight (Command-Space). Make sure that:
- “Built-in Output” is selected
- “44100 HZ” and “2ch-16 bit Integer” is selected