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Set the Macbook Keyboard Back-light to be on permanently

  1. Open Finder
  2. Navigate to: Users/YourUser/NameHere/Library/Preferences
  3. Warning: Be mindful of changing the wrong file or touching incorrect settings in this folder. This could go wrong!
  4. Open:
  5. Change kHWMin to have a value of: 1
  6. Close and save

You have now adjusted the minimum light the light sensor needs to activate the back-light on the keyboard. 

Note: Only valid for Macbook Pros, normal Macbooks do not contain keyboard back-lights.

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