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Is it possible to make my Macbook monitor display grayscale instead of full color? How can I do that? I looked in the Displays preference plane "color" tab but didn't see anything that looked like it could do this.

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up vote 4 down vote accepted

You can set your display to Grayscale in System Preferences » Universal Access » Display » Use Grayscale.

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Alternatively, the third party application Nocturne includes a monochrome setting that makes the display greyscale.

enter image description here

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I cannot provide screenshots, as the effect is applied later, so the screenshots are in color. – Daniel Beck Feb 1 '12 at 18:30

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