Camera or Mic Not Working
on FaceTime or Zoom?

Why the camera “breaks” right before the call that matters

Video calls are how a lot of life happens now — the grandkids' birthdays, the doctor's telehealth visit, the club meeting that moved online and never moved back. So when your box on the screen is black, or everyone's mouthing “you're muted,” it feels like the Mac picked the worst possible moment to quit on you. Here's the honest truth from my house calls: nine times out of ten, nothing is broken. macOS keeps a list of which apps are allowed to use the camera and the microphone, and FaceTime and Zoom each make their own pick of which camera and mic to listen to. Any one of those can quietly go wrong — and every one of them flips back.

One Mac-specific thing worth knowing before you start: your Mac has no sliding shutter over the lens, so that's one suspect you can cross off. What it does have is a small green light beside the camera that comes on whenever the camera does — Apple builds it so the camera can't switch on without it. No green light during a call means the camera was never started, which points you straight at the settings below. No jargon. No judgment. No rushing.

First: test the camera OUTSIDE the meeting app

Open Photo Booth (press Command-Space, type photo booth, press Return) or just open FaceTime, which shows a preview of you before you call anybody. See your own face? The camera and its permission are fine, and the problem lives inside Zoom or whichever app failed. Black screen instead? The block is a permission or another app holding the camera. Either way you just cut the suspect list in half — then quit the test app completely with Command-Q, because a Mac camera serves one app at a time.

Then: can the Mac hear you at all?

Apple menu > System Settings > Sound > the Input tab. Every microphone your Mac can see is listed, with an Input level meter underneath. Say “testing, one two three” in a normal voice. If the bars move, macOS hears you and the trouble is in the app. If they stay flat, the trouble is in macOS. While you're on that screen, click your built-in microphone (it's usually listed as your Mac's model name followed by the word Microphone) and check the Output tab too — a wrong output pick is the whole story behind “I can't hear THEM.”

Turn on the camera and microphone permissions

1. Click the Apple menu (top-left corner) > System Settings.
2. In the sidebar, scroll down to Privacy & Security, then click Camera.
3. Find the app that isn't working — zoom.us, Safari, Chrome — and switch it on. FaceTime and Photo Booth are Apple's own and often don't appear here at all; that's normal.
4. Quit that app completely and open it again. macOS may prompt you to; even when it doesn't, the app usually won't see the camera until it's restarted. This is the step nearly everyone skips — and then concludes the fix didn't work.
5. Now do the identical walk one line down: Privacy & Security > Microphone. Same switches, same quit-and-reopen rule.

Point FaceTime at the right camera and mic

FaceTime hides its device controls where almost nobody looks: the Video menu in the strip of menus along the very top of the screen, which only appears while FaceTime is the app you're using. Open it and you'll find every camera your Mac can see, plus your microphone and audio output further down. Automatic Camera Selection lets FaceTime choose for you — convenient, and occasionally the reason your call is suddenly a lovely high-definition view of a countertop, because your iPhone volunteered as the camera. Pick your Mac's own camera by name and that stops. If the Video menu lists nothing at all, FaceTime is simply using the built-in camera, mic and speakers, which is normal.

Point Zoom at the right camera and mic

1. Open Zoom (no meeting needed) and click the gear icon at the top right — or click zoom.us in the menu bar and choose Settings.
2. Click Video. You should see yourself. If not, try each camera in the dropdown until your face appears.
3. Click Audio. Pick your microphone, click Test Mic and talk — Zoom plays your voice back. Click Test Speaker and listen for the chime.
4. Mid-meeting, click the small ^ arrow beside the Mute button (or beside Start Video) to switch devices instantly, without leaving the call.
5. If your bottom-left button says Join Audio, Zoom connected you with no sound at all — click it, then Join with Computer Audio. This one trips up everybody at least once.

Check the mute museum — and the AirPods in the drawer

• The app's own mute button. A slash through the microphone icon means muted. One click.
• The host muted the room. Common in clubs, classes and church services — that's not your Mac.
• A microphone key in your keyboard's top row, easy to brush while dusting.
• A mute button on the headset cord or earcup — check the gadget, not just the screen.
• The input volume slider in Sound settings, dragged to the bottom.
• And the sneaky one: AirPods sitting connected in their case in another room. Connected is connected — they're the mic and the speakers whether they're in your ears or not. Put both buds in the case, close the lid, and your Mac falls back to its own. The mystery usually ends right there.

Still stuck? Restart, update — and know when it's really hardware

A true restart (Apple menu > Restart) evicts any app quietly holding the camera and wakes everything up; on Macs with Apple silicon it's Apple's own first suggestion. Then check System Settings > General > Software Update, and look at Screen Time > Content & Privacy — Screen Time set up years ago and forgotten can block the camera outright, and Apple flags this one specifically. Two honest signs it's genuinely hardware: the little light beside the camera flashes green (Apple says that one needs service), or no app on the Mac can see the camera even after a restart. That's rare. And one warning while you're searching for help: never call a “Mac camera support number” from a search result or pop-up, and never let a stranger remote-control your Mac. Real fixes live in System Settings, free.

What's in the 27-page PDF

• The three “gates” between you and being seen and heard — and the whole fix in six checkboxes
• A symptom finder table: match what's happening to the exact page that fixes it
• The two-minute tests that tell you whether macOS or the app is to blame
• What the green camera light and the green and orange dots by Control Center actually mean
• Why Macs have no lens shutter — and why Apple asks you not to add one
• System Settings > Privacy & Security > Camera and Microphone, walked click by click
• The quit-and-reopen step that makes a correct fix look like a failed one
• Choosing your microphone and speaker in Sound settings, with the input level meter
• FaceTime's hidden Video menu, and Zoom's settings and mid-meeting device arrows
• Six places a mute can hide, plus camera hogs and the Continuity Camera iPhone surprise
• The camera scams — fake support numbers and “we recorded you” emails — calmly dismantled
• A tape-to-the-fridge pre-call checklist, kitchen-table Q&A, plain-English glossary, and a fill-in cheat sheet

Why I wrote this

I get this call more than almost any other: a video visit with the doctor in twenty minutes, and the camera is a black box. It's nearly always a switch — and nobody should miss a grandchild's birthday over a switch. So I wrote out the walk-through I use on house calls, in the order I actually check things, as a printable handout you can keep by the Mac. If you'd rather do it together, that's a $99 flat visit anywhere in Portage County, 30-day follow-up included. — Bill