I connected an external display and the screens of both my macbook and the external display went garbled after I chose the Mirror option. I have to remove the display connector to restore my macbook display. However, now everytime I connect the external display it chooses the Mirror option so both displays are garbled.
How do I reset it to the default Extended Display option? Tried switching via keyboard hotkey while the external display is connected but no effect.
Any preferences I should delete? Any special key to disable mirroring?
Thanks!
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Apple Genius
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 Let's get this done! 
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In Systems Prefs, under the Displays applet and Arrangement tab, disable the 'Mirror Displays' button. Do this before you connect your external monitor.
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MBP 13 2009, iMac 27 2009, iPad, iPhone 3G, a motley of iPods… The Pen and Paper Club Audiophile Mac Users Pampanga
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Apple Genius
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Quote:
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Let's get this done!
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Ok to connect it, but don't turn it on. That's how it is with my set-up.
Just to test it, I disconnected my external adaptor but still, the Arrangement tab still shows. I'm at a loss as to what's different from my gear to yours. FYI, I'm connected to a DVI monitor. | ||||||||||
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MBP 13 2009, iMac 27 2009, iPad, iPhone 3G, a motley of iPods… The Pen and Paper Club Audiophile Mac Users Pampanga
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Apple Genius
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Found my solution. I deleted the file: com.apple.windowserver.plist and just rebooted the machine. Then I open Preferences and when I connect the external display it has reverted to non-mirrored status. All is ok now - will just remember not to turn on mirroring.
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