Your MacBook does not know better than you. Apple's macOS has an infuriating habit of automatically changing the computer's screen brightness level, seemingly at random. No, it's not all in your head.
Most of the modern devices these days come with a Brightness Control setting that lets you adjust the screen brightness to a level comfortable for your eyes. A similar set of options is available on ...
The brightness level of your display will mess up, causing everything to be bright thus making the text difficult to read Everything on the screen becomes blurry, and color fades out. This problem ...