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How to Turn Camera on Mac OS X?


Summary

How to Turn Camera on Mac OS X? Every MacBook, MacBook Air and MacBook Pro comes with a built-in camera for taking photos and video, including video streaming with your friends. To activate the camera, you need to select an app that uses the camera, like iSight, Photo Booth, or FaceTime.
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How to Turn Camera on Mac OS X?

To use your MacBook's camera, select any app that requires it, such as Photo Booth, FaceTime or Messages. On older MacBooks, you can also use iSight.
 
When you open Photo Booth, the camera comes on automatically. If you are using a video app like FaceTime, click the "Video" button to activate the camera. When the camera is on, a green indicator light appears beside the camera lens above your screen. You will also see the video feed from your camera in the app's window.
 
To turn off the camera, close the app or turn off the video on your video streaming app. The camera's indicator light turns off. The green indicator light turns off, showing that the camera is off and video has stopped.

Why Isn't My Camera Working on My Mac?

However, sometimes the camera doesn't work on the Mac. Why My Camera cannot work on My Mac?
 
There are many potential reasons why your Mac camera cannot work. Among them are mechanical and hardware problems, which are impossible to fix with software tweaks. If your camera is physically damaged, it needs to be replaced. However, if you are not sure whether it is a hardware problem, you can troubleshoot and repair Camera on Mac by following these methods.

Methods of troubleshooting Your Camera

Method 1: Make sure no other apps use the camera

If you are using an app that should access the camera but can't detect it, make sure no other apps are using the camera. For example, if iMovie and FaceTime are both open, one may interfere with the other. If no other camera-friendly apps are running, restarting your MacBook usually clears up the problem.

Method 2: Turn on Camera on Mac for Facetime

As you now know, Mac cameras activate automatically. However, the automatic activation process sometimes fails. To turn on the camera on Mac for Facetime when it doesn't automatically activate, you need to open Terminal from Applications > Utilities. Click inside the terminal window and type "sudo killall VDCAssistant". Hit Enter on your keyboard. You may need to input your admin password. If an error occurs, you will see an error message in the terminal window. If everything goes right, you won't see any confirmation message. Finally, open any app that uses the camera, such as Photo Booth, to confirm that the fix worked.

Method 3: Force-Close Camera Interference

You can enter a command in the Terminal window to disable any apps that may block your access to the camera.
 
        1. Close the app that is trying to access the camera.
        2. Open Terminal by pressing Command-Space on the keyboard, typing "Terminal" and pressing the Enter key.
        3. When Terminal opens, enter the following command: sudo killall Apple Camera Assistant; sudo killall VDCA assistant
        4. Press Enter and enter your administrative password when prompted.
        5. Open the app you want to use with the camera to confirm that the fix worked.

Method 4: update your Mac OS X

If none of these methods work, make sure your MacBook's OS X operating system is updated.

Mac Camera Video Recovery

If you lose video recordings made with your Mac camera, you can use data recovery software such as Bitwar Data Recovery for Mac to get them back. All you need to do is download and install it, and then follow the Requirements for graphical interfaces to recover videos.
 
Tips: For latest macOS 10.13 (High Sierra) system requirements, if you want to recover data from the system disk, please disable the system feature "System Integrity Protection (SIP)" , see the guide on How to Disable System Integrity Protection (SIP) in macOS High Sierra (macOS 10.13)? (https://www.bitwar.net/howto/windows/79.html)
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