The fastest way to turn on your Mac webcam
Your Mac webcam is built into the top bezel of your screen and turns on automatically when an app requests it. You do not need to flip a switch or read anything. Open any app that uses video — FaceTime, Zoom, Google Meet, or Photo Booth — and the camera activates. If you see a green light next to the camera, it is recording.
If no app is open and you want to test the camera, open Photo Booth (search for it in Spotlight by pressing Command + Space, type "Photo Booth", and press Enter). The app opens with a live preview of what your camera sees. That preview means your webcam is on.
On newer Macs with an M1 chip or later, a small green dot appears in the top-right corner of your screen whenever any camera is active, even if you cannot see the app window. Older Macs show a green light next to the camera lens itself.
Key Takeaways
- Your Mac webcam turns on automatically when you open any app that uses video, such as FaceTime, Zoom, or Photo Booth.
- A green light or green dot indicates your camera is active and recording.
- If an app cannot access your camera, check System Settings under Privacy & Security to grant permission.
- Restarting the app or restarting your Mac fixes most camera problems.
- You can disable camera access for specific apps in System Settings without turning off the hardware.
Granting camera permission to apps
The first time an app tries to use your webcam, macOS asks for permission. Click "Allow" to let that app access the camera. If you clicked "Don't Allow" by mistake, or if an app is not showing a camera feed, you need to change the permission manually.
Open System Settings (the gear icon in your Dock, or press Command + comma). Click "Privacy & Security" in the left sidebar. Scroll down and click "Camera". You will see a list of apps that have requested camera access. Toggle the switch next to any app to turn its camera access on or off.
If the app you want to use is not listed, it has never requested permission. Open that app and try to start a video call or take a photo. macOS will prompt you again, and this time click "Allow".
Checking if your camera is working
If you open an app and see a black screen instead of your face, the camera may not be working. First, check that the app has permission (see the section above). Then close the app completely and open it again.
If that does not work, open Photo Booth to test the camera directly. If Photo Booth also shows a black screen, restart your Mac. Shut down completely, wait 10 seconds, and turn it back on. Most camera problems clear after a restart.
If your Mac still shows a black screen in Photo Booth after restart, the camera hardware may be damaged. Contact Apple Support or visit an Apple Store to have it checked.
Turning off camera access for privacy
You can prevent any app from using your camera without unplugging anything. Open System Settings, click "Privacy & Security", then "Camera". Toggle off the switch next to any app you want to block. That app will no longer be able to access the camera, even if it tries.
You can also toggle off the switch next to "Camera" itself at the top of the list to block all apps at once. This does not turn off the hardware — it just prevents software from accessing it. The green light will not appear when apps request the camera.
Why your camera might not turn on
The most common reason a Mac camera does not work is that the app does not have permission. Check System Settings as described above. The second most common reason is that another app is already using the camera. Only one app can access the camera at a time. Close your video call app, web browser, or messaging app, and try again.
If you are using an external USB camera instead of the built-in one, plug it in and open your app. macOS usually detects it automatically. If it does not appear, restart the app or restart your Mac.
Dust or a sticker over the camera lens can also block the image. Look at the small black circle at the top center of your screen. If it is covered, gently clean it with a soft, dry cloth.
Using your camera in different apps
Once your camera is on, different apps use it in different ways. FaceTime and Zoom show a live preview of you during calls. Photo Booth takes still photos and short videos. Google Meet and Slack let you turn the camera on and off during a conversation with a button in the app window.
In most apps, you can choose which camera to use if you have more than one connected. Look for a settings menu or gear icon within the app. Click it and look for "Camera" or "Video Device". Select your built-in camera or external camera from the list.
Frequently Asked Questions
Can I cover my Mac camera for privacy?
Yes. You can place a small sticker or sliding cover over the camera lens. This blocks the image completely. You can also disable camera access for specific apps in System Settings without covering the lens. Both methods work — use whichever feels right to you.
Why does my camera show a green light but no picture?
The app may not have permission to use the camera. Open System Settings, click Privacy & Security, then Camera, and toggle on the switch next to your app. If the switch is already on, close the app completely and open it again. If that does not work, restart your Mac.
Can I use an external webcam instead of the built-in one?
Yes. Plug a USB webcam into your Mac. Most external cameras work without drivers. Open your app and look for a camera or video device setting. Select your external camera from the list. If it does not appear, restart the app or your Mac.
What does the green dot in the corner of my screen mean?
On newer Macs, a green dot appears in the top-right corner whenever any app is using the camera. This is a privacy indicator — it lets you know the camera is active even if you cannot see the app window. Click the dot to see which app is using the camera.
Is my camera always on and recording?
No. Your camera only turns on when an app requests it. If no app is using the camera, the green light is off and no recording happens. You can also disable camera access for any app in System Settings to prevent it from turning on the camera at all.