How do you change microphone settings on a Mac?

Ten minutes into a Zoom call, someone says you sound like you are in a stairwell. You are at your desk. The USB microphone you bought last month sits right in front of you, plugged in, its little light on. The Mac isn't listening to it. When you connected the external display, macOS found the display's own microphone, and Zoom kept using whatever it had picked last week. Nothing on screen told you.

That is the usual shape of a Mac microphone problem. The settings exist, but macOS spreads them across six places, and every call app keeps its own copy of the most important one. This guide goes through all of them in the order worth checking: which mic the Mac uses, how loud it listens, which apps may hear it, how to mute it, the Mic Modes that only appear during a call, and the controls people go looking for and never find, because macOS does not have them.

Two readers should start somewhere else. If no app hears anything at all and the level meter stays flat, open why your Mac microphone is not working first: that page is the troubleshooting path, and this one assumes the mic already works and you want to control it. If you use a MacBook and are not sure where its built-in mic actually sits, where the microphone is on a MacBook answers that before you start moving sliders.

Menu names below match macOS Ventura and later, where the app is called System Settings. On Monterey and older it is System Preferences, and the layout differs.

Where macOS keeps your microphone settings

Here is the whole map on one screen. Most "my Mac mic is broken" moments turn out to be one row of this table set wrong.

Two things are missing from that list, and not by accident. There is no mute switch, and there is no control over how your voice sounds: no tone, no noise filter that works in every app. Both get their own section below.

How to change the microphone on a Mac

Apple's own steps are short:

1. Open the Apple menu > System Settings, then click Sound in the sidebar (you may need to scroll).
2. Click Input.
3. Select the device you want in the list. Every input the Mac can see appears there: the built-in mic, a display's mic if it has one, an iPhone used as a microphone, a USB mic, a headset.
4. Speak at the volume you would use on a call and watch the input level meter. If it moves, the Mac hears that device.

Opening the Input tab turns on the recording indicator by itself, according to Apple's guide. So if you see the orange dot appear while you are in Sound settings, that is the settings pane listening to the meter, not some app spying on you.

The trap is step 5, which Apple does not write down: open the app you call from and check its microphone menu too. System Settings sets the default. Zoom, Google Meet in a browser, Discord, OBS and Telegram each let you pick a mic of their own, and several remember the last one you chose. When the system says "USB microphone" and Zoom says "MacBook Pro Microphone", Zoom wins, and you sound like the stairwell.

There is a faster route, if you switch often. Holding Option while clicking the Sound icon in the menu bar has long shown input devices as well as outputs, a trick Mac users trade on Apple's Ask Different forum. It is undocumented by Apple, so if your macOS version shows only outputs, fall back to System Settings.

How to use an external or USB microphone on a Mac

A USB microphone shows up in the Input list under its own name a few seconds after you plug it in. Select it, and you are done with the system side. Many USB mics run without any driver; Apple's own setup guide for audio devices says to install the software that came with a device only "if necessary". Whether yours needs the maker's app, and what that app adds, is covered in does your USB mic need its own software on a Mac.

Other kinds of external mic behave differently:

• Headset on the headphone jack. On Macs with a single sound port, that port carries stereo out and mono in, so a headset with a built-in mic works there. Select it in Input like any other device.
• XLR microphone. A Mac has no XLR input. You need an audio interface between the mic and the Mac, and the interface becomes the device you select. Do you need an audio interface on a Mac explains when that is worth it.
• iPhone as a mic. Apple lists the iPhone microphone as a valid Mac input. Handy in a pinch, though it ties up your phone for the whole call.
• AirPods and other Bluetooth headsets. They appear in Input like everything else. Input and output are separate choices, so you can keep AirPods as your speakers and pick a different mic in Input. The details of why AirPods mics often sound worse on a Mac live in why your AirPods mic sounds bad.

One documented trap: with a headset plugged into a Mac that is connected to an external display, choosing the display's built-in microphone can snap straight back to the headset. Apple's fix in its support note is blunt: unplug the headset first, then make your selection.

And one physical fact for anyone who runs a MacBook closed on a desk with an external monitor. Per Apple's platform security guide, every Mac laptop with Apple silicon has a hardware disconnect that turns the built-in microphone off whenever the lid is closed. In clamshell mode the built-in mic is not quiet or muffled, it is gone. You need an external mic, a headset or the display's mic.

Mac input volume: the only sensitivity control you get

People search for "mac microphone sensitivity" and expect a sensitivity dial. macOS does not have one. The Input volume slider under Sound > Input is it: a gain control that decides how hard the Mac amplifies whatever the selected mic sends.

Apple's own example sets the logic. Recording loud music, lower the input volume so the sound is not too loud or distorted. Recording someone who speaks softly, raise it so the Mac catches the voice. For calls, a practical target looks like this: talk at your normal call volume, from where you normally sit, and the meter should move well into its middle range with your louder syllables reaching further. If it barely flickers, raise the slider. If it slams to the right end on ordinary words, lower it, because a signal that hits the ceiling clips, and clipping cannot be removed later by any app.

How to increase mic volume on a Mac when the slider is already high

The slider amplifies everything equally: your voice, the fan, the fridge in the next room. Pushed to the top, a weak signal gets louder and noisier at the same rate. So the order of fixes matters:

1. Move closer. Halving the distance between your mouth and the mic raises your voice by roughly 6 dB, the inverse-square law at work, while the room noise stays where it was. No slider can do that.
2. Check the mic's own gain. Many USB mics have a gain knob on the body. That knob acts before the signal reaches the Mac.
3. Then the slider. Now raise Input volume until the meter looks right.
4. Then the app. Zoom, for one, has its own Input volume and an option called "Automatically adjust microphone volume". According to Zoom's settings guide, turning that option on makes the manual slider unavailable, and Zoom suggests turning it off if your audio fades in and out. That fading is the auto-gain chasing your voice.

If you have done all four and you are still too quiet, the problem is usually the mic or its placement rather than a setting, and why your mic is so quiet walks through the remaining causes.

Audio MIDI Setup: the deeper panel

Applications > Utilities > Audio MIDI Setup shows every audio device with its real format. Select your mic and you can set the sample rate and bit depth in the Format menu; Apple's advice is to match the settings the device expects. If the device supports software volume control, per-channel volume sliders appear in blue and you can set each one. If they stay grey, your mic does not expose software gain at all, and its level is set on the mic itself, usually with a gain knob. That explains a common puzzle: a USB mic whose Input volume slider in Sound settings refuses to move.

For calls, leave the format alone unless a recording app complains about a mismatch. Format changes do not make a voice clearer on Zoom.

How to allow microphone access on a Mac

Searches for "how to enable microphone on mac" and "how to turn on microphone on mac" mostly come from one situation: an app hears nothing because it was never allowed to. The built-in mic has no power switch. "Turning it on" means granting permission.

The first time an app wants the microphone, macOS asks. If someone clicked Don't Allow, or the prompt got buried behind another window, the app keeps getting silence until you change it here:

1. Apple menu > System Settings > Privacy & Security.
2. Click Microphone.
3. Turn the switch on for the app.

Some apps only pick up the new permission after you quit and reopen them, so do that before deciding it did not work. If the switch is greyed out on a work Mac, the company's device management may be setting it for you; Apple's page points system administrators to its deployment documentation for exactly that case.

Browsers add a second lock. For Google Meet or any web call, the browser app itself needs to be on in the Privacy & Security list, and the website needs permission inside the browser. In Safari that lives in Settings > Websites > Microphone, where each site gets Ask, Deny or Allow. A site set to Deny there stays silent even though Safari has system permission. Chrome and other browsers keep a similar per-site list in their own settings.

How do you know an app is actually listening? The orange dot next to Control Center in the menu bar. Apple uses it to mark that the microphone is in use right now or was used recently. Apple also reminds you that once a third-party app or site has the mic, what it does with the audio falls under its own terms and privacy policy, not Apple's.

How to mute the microphone on a Mac

Here is the gap that surprises people most: System Settings has no mute button for input. The Input pane offers a slider and nothing else. So muting is done in one of three ways.

In the call app. This is the reliable way, and it is what the other people on the call see as "muted":

With the slider. Dragging Input volume all the way left turns the gain down. Apple does not describe it as a mute, and some USB mics ignore it entirely because their gain is in hardware. Use it as a fallback, and do not trust it on a call where silence matters.

By closing the lid. On a MacBook with Apple silicon, the hardware disconnect mentioned above cuts the built-in mic whenever the lid is shut. It does nothing to a USB mic or headset.

Do not read the orange dot as a mute light. It shows that some app has the microphone open, and a call app can keep it open while you are muted inside that app, just as the slider at zero leaves the device open. Use the dot to catch an app you did not expect, and the call app's own mute icon to know what the call hears.

Mic Modes: Voice Isolation and Wide Spectrum

The one built-in sound-processing control macOS gives you hides until you are on a call. In Apple's words, on macOS Sonoma and later you click Mic Mode in the Video menu or Audio menu that appears in the menu bar while a video call is in progress. On Ventura and Monterey it sits in Control Center under Mic Mode.

The choices:

• Voice Isolation gives priority to your voice and minimizes traffic, a dog barking and other background noise.
• Wide Spectrum captures your voice and the sound around you, such as music. Useful for an online music lesson, where the teacher needs to hear the guitar too.
• Standard returns to normal processing.

Two limits before you count on it. Apple says the options vary by app, and the menu appears in apps that support Mic Modes, FaceTime being the example Apple gives. There is also no place in System Settings to make Voice Isolation the default for everything; it is chosen from the call. So if your Telegram call or your recording app does not show the menu, Mic Modes are not available to you there.

What macOS will not let you set

This is where most searches dead-end. After the device, the gain, the permission and the Mic Mode, macOS has nothing left to offer for your voice. There is no input equalizer, so you cannot take the boom out of a desk mic or add presence to a dull built-in one. There is no compressor to even out a voice that jumps between whisper and laugh. There is no noise gate, no de-esser, no room echo control, and no noise reduction that works in every app. The Mac passes along whatever the mic hears, at the gain you chose.

Which microphone settings actually change how you sound goes deeper on what each of those missing controls would do. For a Mac, the practical options fall into three groups:

• The app's own processing. Some call apps have noise suppression of their own. It lives inside that one app and changes when you switch apps. If you mostly live in one, start with its settings, for example the Zoom audio settings worth changing.
• Per-app tools. OBS has a filter chain for streams and recordings (see which OBS mic filters to use), and Rogue Amoeba's pair does the same for calls if you are willing to assemble it: Audio Hijack builds the processing chain, and Loopback turns its output into a virtual device other apps can select. The two are compared in Audio Hijack vs Loopback.
• A virtual microphone. A program creates a new input device, processes your real mic inside it, and every app picks that device instead. What a virtual microphone is explains the mechanism.

TunedMic is a virtual microphone of that third kind. After installation, a device called TunedMic appears in the same Input list you used above, and in the mic menus of Zoom, Meet, Teams, Slack, Telegram, Discord, OBS and browsers. Your real mic stays as it is. Setup is a one-minute Sound Check: you read a short passage aloud while TunedMic takes more than 30 measurements of your voice, your mic and your room, and builds nine profiles from that reading. That is the part macOS cannot do: the tone, noise and loudness work fitted to one voice in one room, used by every app that picks TunedMic as its mic. If you want to steer it, there are manual controls for noise, room echo, clarity, loudness and a 12-band equalizer, but you never have to touch them. It runs locally, the voice is never uploaded, and it adds less than a tenth of a second of delay.

The limits, stated plainly. TunedMic needs a Mac with Apple silicon (M1 or newer) and macOS 14 or later; Intel Macs are not supported and there is no Windows version. You get 3 days free, then it costs $39 once at the launch price, with no refunds. The home page has before and after recordings from a Hollyland Lark M2 clip-on (once with a Dyson hair dryer running a meter away), a MacBook's built-in mic and a cheap wired headset to listen to first. And it does not replace anything in the sections above. If Zoom is set to the wrong device, if permission is off, or if the mic sits a meter from your mouth, fix that first. Processing cannot rescue a signal the Mac never received.

A settings pass before your next call

Ten minutes, done once, saves the "can you hear me" opening on every call after. Here is the chain with the values to aim for. Replace the device names with yours.

System Settings > Sound > Input
  Device ............ your USB mic or headset, not "MacBook Pro Microphone"
  Input volume ...... meter in its middle range at call volume, never pinned right

Mic gain knob (if your mic has one)
  Set first, then the slider

Privacy & Security > Microphone
  zoom.us / Google Chrome / Safari / Telegram .... on

Safari > Settings > Websites > Microphone
  meet.google.com ... Allow (or Ask)

Zoom > Settings > Audio > Microphone
  Device ............ same as System Settings
  Automatically adjust microphone volume .. off if your level fades in and out

During the call: Video or Audio menu > Mic Mode
  Voice Isolation for a noisy room, Wide Spectrum for a music lesson

Mute: Zoom Cmd+Shift+A, Google Meet Cmd+D
  Orange dot = an app holds the mic open, not proof the call hears you

The last check is the one most people skip: hear yourself the way the other side does. A five-second recording tells you more than any meter, and how to test your mic and hear what others hear shows the quickest ways to do it on a Mac.

Your next step

Open System Settings > Sound > Input right now, say one sentence at call volume, and see where the meter lands. Then open the app you call from most and make sure its microphone menu names the same device. That covers most of what people mean by "change microphone settings on a Mac".

If every row above is right and people still tell you that you sound thin, boomy or far away, the settings are not the issue. Play the before and after recordings on the TunedMic home page with headphones, and if the MacBook or headset samples sound like your problem, the pricing page lists exactly what the one-time license includes.