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. 打开系统偏好设置 点击屏幕左上方的苹果图标，Select "System Preferences"。 2. 进入键盘设置 在弹出的界面中，Click "Keyboard"。 3. 调整键盘背光设置 在“键盘”标签页下，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。...