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Q: how do i disable my macbook pro monitor and use external monitor

been trying to us my hdmi for my monitor and turning off my macbook pro monitor, but i can't do it.  can anyone help?  I am using the most up today OS.

MacBook Pro with Retina display, OS X Yosemite (10.10.1)

Posted on Jan 14, 2015 9:58 PM

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Q: how do i disable my macbook pro monitor and use external monitor

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