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。...

When using a Mac computer，for safety，Many users will set an administrator password。If you accidentally forget your Mac administrator password，don’t worry，Here are a few ways you can reset your password and restore access。 未开启FileVault的用户 方法一：使用Apple ID重置 在OS X Mavericks（10.9）及其后续版本中，Apple integrates Apple ID and administrator password，Allow quick reset of user password using Apple ID。Please make sure your Mac is logged in with Apple ID，And check "Allow users to reset passwords using Apple ID" in "System Preferences - Users & Groups - Sign-in Options"..