What is Brightness?
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Brightness adds a menu bar item for adjusting your display’s brightness. And, and if your PowerBook, MacBook or MacBook Pro has a backlit keyboard, Brightness adds a second menu bar item for adjusting it.
Installation
Drop Brightness into your Applications folder or any other folder of your choice, then double-click its icon to launch it.

To make Brightness always available after a restart, you should add it to your login items:
  1. Open up the System Preferences
  2. Click on the “Accounts” item
  3. Click on “Login Options”
  4. Choose the “Login Items” tab and add Brightness to the list
If you need to quit the app, simply open the Activity Monitor, select “Brightness” from the list of processes and press the “Quit Progress” toolbar button.
Purchase
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What's it cost? Nuthin'. Nada. Zip. It's freeware :)
Download
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Requires Mac OS X 10.5 or later

It is recommended that you install Brightness in the "Applications" folder, but it can be installed anywhere on your system if you prefer. Simply drag and drop the application to the destination folder of your choice.
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