Once the Camera app opens, your computer's camera should turn on automatically ... it might have come with its own software. Make sure you've set up the webcam correctly, and that it's fully ...
If you have a MacBook Air or 13" MacBook Pro, your computer comes with a 720p camera. But if you have a 14 or 16" MacBook Pro, your laptop comes with a higher-definition 1080p camera. Fortunately ...