
Enable the option and the device will adjust the brightness automatically based on the surrounding light. If your MacBook or Mac has an ambient lighting sensor, then you will see the Automatically adjust brightness option under the same menu System Preferences -> Display. That's why there are, on many MacBooks, buttons right on the keyboard to let you do just that. Automatically Adjust Brightness Macs Screen Brightness. Let's be clear: Manually adjusting your screen brightness makes sense. The light sensor (ambient light sensor) it is located next. If you work in a place where the light changes throughout the day - say there's a skylight above you, or you're next to some windows - this setting means your screen is constantly doing visual summersaults in front of your eyes. It will happen the other way if the light in the room is weak. Working in your dark bedroom to start the day, but your sunny backyard after lunch? Your Mac, at least in theory, will figure it out.īut reality is often quite different from theory. Some MacBooks are equipped with ambient light sensors, and will attempt to automatically adjust the screen brightness to compensate for changes in surrounding light. Thankfully, you can turn off this annoying so-called feature. Your MacBook does not know better than you.Īpple's macOS has an infuriating habit of automatically changing the computer's screen brightness level, seemingly at random.
