If your MacBook mic works in one app but not another, the cause is per-app permission in System Settings, Privacy and Security, Microphone — each app needs its own tick.
MacBook Mic Test: the full method
- Grant permission first
System Settings, Privacy and Security, Microphone. Your browser must be listed and switched on, otherwise the page hears nothing at all.
- Press Start test and speak
The meter should respond immediately. MacBook microphone arrays are sensitive, so expect healthy levels even at arm's length.
- Cross-check in Sound settings
System Settings, Sound, Input. The input level meter moves as you speak and lets you set the input volume.
- Try QuickTime Player
File, New Audio Recording captures a sample with the same input. If QuickTime works and the browser does not, it is a permission issue.
- Check Ambient Noise Reduction
In Sound, Input, macOS offers noise reduction on some models. Turn it off if your voice sounds gated or processed.
- Record and listen
Use the Record panel above to capture a sentence and play it back through the same Mac.
Mac microphone fixes
- Nothing works after an updateReset the audio daemon by running sudo killall coreaudiod in Terminal, then retest. macOS restarts the service automatically.
- Browser has no permissionmacOS requires per-app microphone permission and browsers are treated as one app. After enabling it, quit and reopen the browser completely.
- Input level slider at zeroSystem Settings, Sound, Input. The slider resets after some updates and produces a completely silent microphone.
- Wrong input selectedDisplays, capture devices and virtual audio drivers such as Loopback or BlackHole often take priority. Choose the correct input explicitly.
macOS permission is a two-step process
macOS grants microphone permission per application, and browsers only pass that permission to websites after holding it themselves. A site can therefore be allowed inside Chrome while Chrome itself is blocked by the system — producing a page that appears to have access and still hears silence.
The reliable order is: grant the browser access in System Settings, quit the browser completely, reopen it, then allow the site when asked. Skipping the restart is the most common reason the setting appears not to take effect.
Frequently asked
How do I change the input volume?
System Settings, Sound, Input, then drag the input volume slider while watching the level meter.
Does a Mac need microphone drivers?
No. macOS uses Core Audio with built-in class support for USB and analogue devices.
Where is the microphone on a MacBook?
Recent models place a three-mic array beside the speaker grilles or near the camera. It is not a visible hole on most modern designs.
Why does my Mac mic work in FaceTime but not in Chrome?
Each app has its own permission entry in Privacy and Security. Enabling one does not enable another.
Related tests
Related guides: the main test console, what makes a mic unclear, or testing an iPhone microphone.
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