The webcam light located at the top of the screen on every MacBook Air and MacBook Pro comes on whenever an application activates the FaceTime camera beside it. Macs don’t have a control to turn off the webcam light without turning off the webcam as well. To turn off this light, you must deactivate the webcam using the application’s controls or quit the application using the webcam. The location of the controls vary with every app. Some applications like Photo Booth won’t deactivate the webcam until you quit the application. Tips Warnings Writer Bio

How to Turn off the Webcam Light on a MacBook - 84