![]() ![]() It can also help if you’re constantly annoyed by your Mac adjusting the screen brightness to a level it thinks is best. Turn off automatic screen brightnessĭisabling auto-screen brightness can ensure a uniform experience if your work, like video editing or image color correction, involves using the screen at a fixed brightness. ![]() It’s also possible that screen brightness is malfunctioning due to temporary glitches, and the quickest way to fix this is by restarting your Mac from the Apple menu > Restart. If you have put a piece of tape or a cover over the camera for privacy or mounted a webcam to your Mac that partially blocks the ambient light sensor, then remove it to prevent your Mac from changing the brightness irregularly. To address this, wipe the ambient light sensor area using a soft cloth, and your Mac will undoubtedly stop changing the screen brightness automatically/randomly. This regularly causes the ambient light sensor to work improperly, as it can’t gather the light information correctly due to the layer of dirt blocking it. Since the ambient light sensor is in the middle of the top bezel of the MacBook, body oils and dust from your finger may smudge this sensor when you open and close the lid. New iMac with Apple silicon and Apple Studio Display: Top left bezel area of the screen ( See video).MacBook, MacBook Air, MacBook Pro, and old iMacs: Near the top FaceTime web camera.Here’s the location of ambient light sensors on Mac: Like iPhone, iPad, and most other smartphones, your Mac laptop, iMac, and Studio Display have an ambient light sensor, which adjusts the display brightness based on the light in your environment. This is the most important solution if your MacBook Air or MacBook Pro is randomly changing the screen brightness without you touching the brightness key or modifying the light in your room! So, immediately after turning on your Mac, it’s normal to see a gradual increase or shift in screen brightness for a short while. 17) Reinstall macOS Wait a short while for the screen to warm upĪfter you boot up your Mac, its display may take a while to warm up and slowly reach full brightness.
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