Fix Internal Microphone Not Working on macOS Mojave

Fix Internal Microphone Not Working on macOS Mojave

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Fix Internal Microphone Not Working on macOS Mojave on MacBook and iMac

Overview: Today in this post we will perform troubleshooting steps to fix Microphone issue on your Mac. The microphone is not working for many Mac users after upgrading the system to macOS Mojave.

So, let’s start with the real user’s practical scenarios!

Scenario 1: iMac Internal Microphone Not Working

Perhaps a couple of months ago, I had trouble using Skype: the other party could not hear me. Last week I was trying to test up to use another video conferencing system that provides a video & audio test in setting up prior to use. Could not get any VU-meter response on mic test. Tapping on the iMac case showed signal to the VU-meter. Is there any way to test for certain this is a hardware problem? Can there be a software/OS problem here, like a corrupt driver or .plist, etc? (Running OS 10.10) What about an external mic: who has had success with using that instead? Thanks!

Source: Apple Community

Scenario 2: Microphone Not Working After Update to OS X Mojave

Hello, ever since I updated my MacBook Pro early 2015 to OS X Mojave my microphone is not working. It works on the guest account, but not on my main one. Is there a way to fix this? Thank you!

Source: Apple Community

Like the above users, there are multiple Mojave users who are facing microphone issue, let’s go ahead and fix this.

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Restart Your Mac

Most of the time simple restart fixes the issue. Click on Restart from the Apple Menu and check the microphone functionality on the Mac

Check the Microphone Settings

  • Go to the Apple Menu and select System Preferences
  • Find Sound and launch it, go to the Input tab and select Internal Microphone and speak to the Microphone to check the activity in Input level. If you see blue bar activity while you speak then Microphone is working fine. Also, make sure to drag the Input volume to the maximum.

Microphone setting on Mac

Allow Control Access to Your Microphone on Mac

In case, the microphone is not working with any app then do the following:

  • Go to the Apple menu > System Preferences, click on Security & Privacy, then click on Privacy.
  • Click on Microphone.
  • Check the tickbox next to an app (e.g Skype or any other app on which you want to use Microphone) to allow it to access the microphone.

Allow Control Access to Your Microphone on Mac

Disconnect Third-Party Peripherals From Your Mac

Third party devices connected to your mac can sometimes cause conflict and can stop the microphone from working. Disconnect all the third party devices and restart your Mac and check the microphone.

Reset SMC

  • Go to the Apple menu and shut down your Mac.
  • Once Mac shuts down, press and hold the Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10-15 seconds.
  • Now Release all keys.
  • Press the power button again to turn on your Mac.

For iMac computers

  • Go to the Apple menu and shut down your Mac.
  • Unplug the power cable.
  • Wait 15-20 seconds.
  • Plug in the power cable back.
  • Wait for 10 seconds and start your Mac.

Reset PRAM and NVRAM

  • Shut down Mac
  • After few seconds start the Mac and press and hold Option, Command, P and R keys on the keyboard together.
  • Hold the keys down till the Mac reboots and you hear a beeping sound.

Repair Disk Using Disk Utility on Your Mac

  • Go to the Apple menu > Restart, press and hold the Command and R keys until the Apple logo appears, then release the keys.
  • Click Disk Utility and click Continue.
  • Select View and then click on Show All Devices.
  • In the sidebar, select the disk you want to repair.
  • Click the First Aid button.
  • Click Run.

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Start Mac in Safe Mode and Check Microphone

  • Shut down your Mac.
  • Now start your Mac and immediately Press and hold the Shift key as soon as the start-up sound is heard.
  • Release the Shift key when you see the Apple logo. Safe Boot appears on the macOS Mojave start-up screen.

Safe Mode restricts the use of many applications on the system and allows examination in a more restricted environment. In case the microphone works in Safe Mode then you have to isolate the software which is causing the issue.

Create Another Account on Mac

  • Go to the Apple menu, select System Preferences and then click on Users & Groups.

Users and group


  • Click on the lock icon to unlock it, put your administrator name and password.

Click on the lock Icon Mac

  • Now click on Add or Plus icon to create new account

Click on the plus icon

  • Click the New Account pop-up menu and then choose a type of user i.e. Administrator or Standard user and put all the necessary details and Click on Create User.

Admin account

Now check the microphone, in case, the microphone works fine then old profile may have gone corrupt. Transfer all the data to the new account and start using your Mac.

Run Apple Diagnostics

It’s good to know if there is any hardware failure on your Mac. Run built-in Apple Diagnostics on your Mac. A bad hardware component may be responsible for Microphone not working.

To run a hardware test, do the following:

  • Plug out all the external devices except mouse, keyboard, Ethernet cable, and AC power connection.
  • Shut down your Mac.
  • Start your Mac and immediately press and hold the letter D key on the keyboard. Keep holding the D key until you see choose your language screen. It will automatically start the test, it may take a few minutes to complete the test, once the test completes it will provide you reference codes and let you know if there is any hardware failure.

Apple built in diagnostic

  • You can click Restart or press R to restart your Mac.

Perform Clean Installation of macOS Mojave from USB flash drive

In case none of these steps works then performing a clean installation may help you to fix microphone issue. Please note that you will lose all your data on the Mac. Visit this link to perform the clean installation: Apple link How to create a bootable installer for macOS

Wrap Things Up

I hope this article helped you to fix microphone Issue on Mac.

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