Apple warns thick webcam covers can damage MacBook displays

Apple warns that webcam covers can damage MacBook displays because the lid and keyboard are designed to close with almost no extra space between them. A cover can concentrate pressure on a small area, potentially leaving marks, cracking the screen or stopping it from working.

Apple recommends covers no thicker than about 0.1mm, roughly the thickness of a sheet of paper, and says cover-related damage is not covered by warranty. Adhesive residue may also interfere with camera sensors used for features such as automatic brightness. MacBooks signal camera use with an indicator light or, on the Neo, an on-screen green dot; users can review app access in Privacy & Security settings.