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I would like to have the colors of my Macbook's keyboard backlight change either permanently or on a cycle. If this can be done in terminal, let me know. I don't want to at all ever open my computer.

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I must be misunderstanding what you're asking, because I'm not sure how on earth you could see what's on the screen properly if you're messing with the backlight on the display... – Shinrai Mar 16 '12 at 15:25
Could you please be more specific. Which model Mac? Are you referring to the actual backlight of the screen, keyboard or the Apple logo? Although as far as I am aware the colour of the lighting can't be changed as it is hardware controlled. – BinaryMisfit Mar 16 '12 at 15:26
up vote 3 down vote accepted

Changing the color of your display or keyboard backlight is impossible to do programatically, unless the manufacturer designed it with that capability to change color and to do so using software controllers.

It is highly likely that this is not the case, as it is not common except in very specific circumstances (for instance, the backlight on my old Nokia phone's keypad could do this, and I have an external USB keyboard that has different colored backlight options, but cannot change them programatically). If you want to change the color of the backlight and this path is not already available to you, you will have to open the computer up and swap out the light(s) yourself.

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Thanks. I was just wondering, some guys in my health class thought it would be cool, and I wondered if Macs had the capability to do so. – JShoe Mar 16 '12 at 18:15
Not to mention unless it had a RGB Led array, its physically impossible. There is one keyboard on thinkgeek that allows this i think – Journeyman Geek Mar 17 '12 at 2:12

No. There is nothing controlling the color of the light. It's just an array of LEDs turned on to light up the keyboard.

To change the color, you will need to use a color filter to filter the light with a color.

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