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MacOSX use only external screen

Posted on 2011-10-24
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Hi there, i have a MacBook Pro 15'' and when at home i attach to it my external 24'' screen.
Given that i have a keyboard and mouse attached as well, i would like to completely disable the screen of the mac.

While i could just have all my windows on the big screen i want to use "expose" as if i had only one screen...I know there is a solution for what i want by closing the lid of my macbook but when this happens my macbook overheats.

So how can i disable the screen of my mac book???

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Question by:ioustinos_sarris
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Eoin OSullivan earned 2000 total points
ID: 37018505
If you close the lid briefly to activate the screen dimming then re-open as described in this article it works
http://hints.macworld.com/article.php?story=20070504003442646

In OSX Lion there seems to be an issue that others have had .. which makes it harder to make the laptop screen go to sleep.  This is a Terminal command to disable the display but it might be too crude for your needs.
http://osxdaily.com/2011/09/14/disable-the-internal-screen-on-a-macbook-pro-or-air-in-mac-os-x-10-7-lion/

There are a few tools to stop the Mac engaging screensaver and sleep mode such as Caffeine or InsomniaX
http://www.macupdate.com/app/mac/24120/caffeine
http://semaja2.net/insomniaxinfo
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