After all, you have updated the macOS to the newest macOS Mojave. A lot of new functions are now available to use in macOS Mojave, and you will enjoy MacBook UI and supportive features. On the other side, you have to deal with few bugs they will act as a roadblock in your journey. When my colleague updated the Mac to macOS Mojave, he was facing sound not working on Mac in macOS Mojave. Then after trial and error method, we tried to fix the sound not working in Mac and the trick worked.
New to Microsoft Teams? Use this guide to learn the basics. Microsoft Teams Manage your team Add or remove members, create a new channel, or get a link to the team. Add files Let people view a file or work on it together. Compose a message Type and format it here. Add a file, emoji, GIF, or sticker to liven it up! Reply Your message is attached. On your Mac, choose Apple menu System Preferences, click Sound, then click Input. Select the device you want to use in the list of sound input devices. All sound input devices available to your Mac are listed. If your display has an internal microphone, it’s listed as “Display Audio.”.
So I would like to share some useful tips regarding fix Audio won’t work in macOS Mojave.
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Quick look:
Try this:
Step #1: Click on “Apple Menu”.
Step #2: Open “System Preferences” and click “Sound”.
Step #3: Select the Output devices as “Internal Speakers”.
Step #4: Also check the “Output volume’s” slider is on the right side.
Step #5: Besides, also make sure that the “Mute” is not selected.
Step #1: Click on “Apple” icon and open “System Preferences”.
Step #2: Click “Sound” and then click on “Output”.
If your PC has an only single audio port, then click on “Use audio port for” and select Sound Output and select the external speakers.
Step #1: Open “Apple” menu and then click on “System Preferences”.
Step #2: Click “Sound” and choose “Output”.
Step #1: Go to “System Information”.
Step #2: In the “Hardware” section, select “USB”.
Also check the connected speakers are on the list and if they are not, then unplug and re-plug the speakers. Still, the external speakers are not responding then prefer manual guide of the speaker.
Step #1: Tap “Apple” menu and open “System Preferences”.
Step #2: Open “Sound” and click “Output”.
Step #3: Select “Display Audio” from the “Output” device list.
Step #1: Click on “Apple” menu and select “System Preferences”.
Step #2: Click “Sound” and select “Output”.

Step #3: Again, select the “Digital Output”.
In case of the internal speaker not working then Try external speakers as an output device
You should Re-install macOS Mojave using create bootable USB installer
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You can also Downgrade from Mac Mojave to Mac High Sierra.
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