Apple's new MacBook series notebooks are equipped with keyboard backlights，Can provide lighting when light is low。However，Sometimes you may encounter a situation where the Mac keyboard light cannot be adjusted。Here are the steps on how to adjust MacBook keyboard backlight brightness：
1. Open system preferences
Click the Apple icon in the upper left corner of the screen，Select "System Preferences"。
2. Enter keyboard settings
In the pop-up interface，Click "Keyboard"。
3. Adjust keyboard backlight settings
Under the "Keyboard" tab，Uncheck the "Automatically adjust keyboard brightness in low light" option。so，You can manually adjust the brightness of the keyboard light。
Go through the above steps，You can freely adjust the brightness of MacBook keyboard backlight。
