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How to Fix the Microphone on Mac

Last reviewed · fixmic team

macOS has stricter microphone privacy than Windows, so the most common cause of a silent mic is a missing permission. The other big one is input volume set too low. Here is the order to check.

Try this first

System Settings → Privacy & Security → Microphone. Make sure the app you're using is toggled on. macOS requires you to fully quit (Cmd + Q) and reopen the app for the change to apply — closing the window is not enough.

1. Grant microphone permission per app

Every macOS app needs explicit permission to use the microphone, granted by you the first time it asks. If you missed the prompt or denied it, you have to grant it manually. Major macOS upgrades occasionally reset third-party app permissions.

  1. Apple menu → System Settings → Privacy & Security → Microphone

    You'll see a list of every app that has ever requested the mic. Toggle on each app you want to use.

  2. Quit and reopen the app

    macOS requires the app to be relaunched for the permission to apply. Press Cmd + Q in the app, then reopen it. Just closing the window is not enough.

  3. If the app is not in the list

    It has never tried to use the mic on this Mac. Open the app and try to start a call or record — macOS will then prompt you, and the toggle will appear.

2. Check the input device and volume

macOS picks an input automatically but doesn't always pick the one you want — especially when AirPods or a USB headset are connected.

  1. System Settings → Sound → Input

    Pick the device you intend to use. Watch the input level meter — speak normally. The bar should bounce in the middle of the meter.

  2. Adjust 'Input volume'

    If the meter barely moves, slide 'Input volume' to the right. If it pegs at the top with normal speech, slide it left to avoid distortion. (Note: the legacy 'Use ambient noise reduction' option was removed by macOS Ventura — it no longer exists on Sonoma, Sequoia, or Tahoe.)

3. Pick the right Mic Mode for the app

macOS adds per-app Microphone Modes — Standard, Voice Isolation, and Wide Spectrum. The wrong mode can muffle or clip your voice. The Mic Mode menu only appears while an app is actively using the mic.

  1. Open Control Center while in a call

    Click Control Center in the menu bar → 'Mic Mode'. The menu lists each app currently using the mic. Pick the mode per app.

  2. When to use which

    Standard = neutral default. Voice Isolation = aggressive noise removal for noisy environments (cuts background but can sound thin). Wide Spectrum = capture everything for music, instruments, or natural room sound.

  3. Some apps don't expose modes

    Options vary by app. If an app doesn't support modes, Standard is used. Try switching the call to a different app to test whether Mic Mode is the issue.

4. Fix browser-specific issues

Safari and Chromium browsers each have their own permission layer on top of macOS.

  1. Safari → Settings → Websites → Microphone

    Find the site in the list and set it to Allow. Safari Private Browsing windows block persistent mic permissions by default — use a regular window.

  2. Chrome / Edge: tune icon → Site settings

    Click the tune icon (formerly the padlock — changed in Chrome 117) on the left of the address bar → Site settings → Microphone → Allow. Power-user shortcut: chrome://settings/content/microphone.

5. Restart Core Audio

When the macOS audio system gets stuck, restarting one process is faster than rebooting.

  1. Open Terminal

    Run: sudo killall coreaudiod — enter your admin password. macOS restarts the audio daemon automatically; mic functionality usually returns within a few seconds. Alternative: sudo launchctl kickstart -kp system/com.apple.audio.coreaudiod

6. Reset SMC (Intel) or restart fully (Apple Silicon)

On Intel Macs, the System Management Controller handles low-level audio routing. Apple Silicon Macs do not have an SMC — a clean shutdown does the equivalent housekeeping.

  1. Intel laptop with non-removable battery

    Shut down. Hold Shift + Control + Option (left side) + power button for 10 seconds. Release, then power on normally.

  2. Intel desktop (iMac, Mac mini, Mac Pro)

    Shut down. Unplug the power cord. Wait 15 seconds. Plug back in, wait 5 seconds, press power.

  3. Apple Silicon Mac

    There is no SMC. Choose Apple menu → Shut Down (not Sleep), wait 30 seconds, then power on. NVRAM resets automatically when needed; no manual procedure exists.

  4. Intel NVRAM reset (if you want it)

    Shut down. Press power and immediately hold Cmd + Option + P + R for about 20 seconds. Release.

Microphone still not working on Mac?

If the System Settings → Sound input meter does not move when you speak, regardless of which device is selected, look at hardware and known issues:

  • Built-in MacBook mic: try a different USB-C or 3.5 mm port; the mic shares pathways with audio routing.
  • External mic: test on a second Mac or a Windows machine to rule it out.
  • Sequoia 15.4.1 to 15.5 had a regression where the built-in mic became distorted or silent after wake-from-sleep. Apple fixed it in 15.6. Workaround if you're stuck on an older version: open Audio MIDI Setup and set the mic and speaker to a matching sample rate (e.g. both 48 kHz).
  • AirPods or any Bluetooth headset sounding terrible on calls? That is the Bluetooth profile switch, not your Mac. See the AirPods/Bluetooth guide for the input-swap workaround.
  • If your Mac is under warranty or AppleCare, run Apple Diagnostics (hold D at boot on Intel; power button → Diagnostics on Apple Silicon).

Related guides

Test the fix

Run the live test. If you see the meter respond to your voice, your mic is ready for any app on your Mac.

Run the microphone test