Then, select the camera icon from the list of options that pop up. Go to or, navigate to any chat (you can use the one with yourself), and click the plusicon next to where you’d type a message. No need to make a video call tocheck whether the camera is working. You can also enable the camera using online apps such as Facebook Messenger. You’ll seea green LED light up and, if everything is working correctly, you should see yourself using either of the two. Enabling any of the two apps will engage the camera. Thereare two apps that you’ll find on your Mac by default that use iSight: FaceTime and PhotoBooth. To enable the camera and check whether it’s performing optimally, you have to know which apps use it.