The solution to this is simple enough: adjust the Mac so that the source of bright lighting no longer shines on the screen and near the front camera. In some situations, direct illumination, bright lights, sunlight, or glare can shine directly on the light sensor on the MacBook Pro or MacBook Air, and when this happens, the illumination indicator and controls will lock. Solution # 1: Adjust the Mac & Light Sensor The easiest way to check if the keyboard backlight is on is to try to adjust the backlight up to make it brighter, which is usually done by hitting the Mac laptops ‘F6’ key. Your keyboard is not broken.3 Tips in front of How to Fix keyboard backlight on MacBook Pro or Airįirst of all, ensure your Mac laptop supports keyboard backlighting (virtually any vaguely new model MacBook Pro, MacBook Air, or MacBook does), and that keyboard backlight is turned on.
No more panic when you see the locked keyboard backlighting pop-up from now on. You can adjust the illumination normally by pressing the “F5” or “F6” function keys. This can make the system think you are in a dark room, hence allowing the backlighting to unlock. In order to force the keyboard backlighting to switch on, you can temporarily cover up the ambient light sensor. When the room is brightly lit, the system will disable the backlighting completely to conserve battery life, therefore showing the lock symbol. The ambient light sensor is also responsible for changing the keyboard illumination automatically. Similar to the auto brightness settings for the main display, the built-in ambient light sensor, located next to the front-facing camera, will adjust the screen brightness according to the surrounding environment. Fortunately, this is one of the macOS‘s features, and your keyboard probably still works perfectly. If you own an Apple MacBook with a backlit keyboard, have you ever been unable to adjust the keyboard backlighting? Instead of showing the brightness level, the pop-up displays a prohibition symbol (🛇), while the backlight will remain off.
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