Brightness is a menu bar item that allows users to adjust the brightness of their Mac's built-in display and backlit keyboard. It can also adjust the backlighting for MacBooks and MacBook Pros with a backlit keyboard. Brightness cannot currently control external displays like the Apple Cinema Displays.
Brightness is a menu bar item for adjusting the brightness of your Mac's built-in display and backlit keyboard. If your MacBook or MacBook Pro has a backlit keyboard, Brightness adds a second menu bar item for adjusting it. Please note that Brightness cannot currently control the backlighting for external displays like the Apple Cinema Displays.
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