Mac Microphone Solutions
Select the input you want to use
Click the Apple menu
Click System Preferences
Click Sound
Click Input
Select the device you want to use in the list of sound input devices
Check the microphone permissions
Click the apple icon in the menu and select system preferences
Click Security and Privacy
Click the privacy tab
Click Microphone
Make sure the web browser you are using is check marked
Content & privacy restrictions
Click the apple icon to the top left of your display
Click System Preferences
Click Screen Time
Click Content & Privacy
Click “Turn Off”
Make sure that input & output are not muted
Click Apple Icon
Click System Preferences
Click the input tab and make sure the mute check box is not checked
Click the output tab and make sure the mute check box is not checked
Check the input volume slider
Launch System Preferences
Select the Input Tab
Make sure the Input Volume Slider is not turned all the way down
Forget and resync AirPods
On your Mac, click the Apple icon in the menu bar and select System Preferences
Click the Bluetooth icon in the preference pane
Right-click your Airpods in the Devices list
Click Remove in the contextual menu that appears
Click Remove again to confirm
Put both AirPods in the charging case and open the lid
Press and hold the setup button on the back of the case until the status light flashes white
Select your AirPods in the Devices list, then click Connect
Make sure your AirPods are charged.
Turn off Bluetooth on other devices that use your AirPods to avoid resyncing while in session.
Use software update
Choose System Preferences from the Apple menu , then click Software Update to check for updates
If any updates are available, click the Update Now button to install them
Disable any audio or camera Apple extensions
Click the apple icon
Click System Preferences
Click Extensions
Go through all items on the left hand side and disable any extensions that has to do with audio or video
Some system extensions aren't compatible with current versions of macOS or might not be compatible with a future version.
Restart your Mac
Select the Apple icon in the top menu bar
Click Restart