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How do I change the color depth of a monitor in Lion/10.7? I vague remember it being an option in the display prefs or the display menu bar in an older OSX version, but it seems gone in 10.7?

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Why do you want to do this? –  lhf Sep 11 '12 at 16:34
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2 Answers

You're right in that Apple removed the option to switch between "Millions" and "Thousands" of colors from the Displays preference pane in OS X after Leopard (10.5).

I've not tried them, but something like Display Maestro or SwitchResX both appear to have the ability to change color depth and might help.

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Thanks! Display Maestro seems to work, SwitchResX does not seem to have a color depth option in Lion. –  studgeek Sep 11 '12 at 15:01
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I've discovered the Quicksilver Displays plugin changes color depth for Lion as well. If you use Quicksilver already (and you should) its very easy - search for the display name, choose the color depth action, and choose the depth you want. It's great for changing display size also.

A little more info is here - http://lifehacker.com/322363/top-10-quicksilver-plug+ins.

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