Security professionals, system administrators, and similar folks can benefit from this procedure. It’s definitely for anybody who wants the privacy of having their cameras turned off. This process isn’t for the average Mac user, but perhaps it should be. If your Mac is still running a version of macOS or OS X earlier than 10.15.1, the solution involves the Terminal, some caution, and perhaps nerves of steel. The first method, which works on macOS Catalina, is simple and straightforward. There are actually a couple of ways to disable your Mac’s front-facing camera altogether, and they won’t leave sticky residue on the component. (Hint: Apple says don’t do that.) Perhaps you use an app like Oversight, instead, so you can detect camera activity.
If you worry about your privacy, you might be the type to disable webcam by putting tape over your iSight or FaceTime camera.