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Enable HiDPI mode in Mountain Lion w/o Quartz Debug

View hidpi.txt
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sudo defaults write /Library/Preferences/ DisplayResolutionEnabled -bool YES;
sudo defaults delete /Library/Preferences/ DisplayResolutionDisabled;
// by the way, you need to logout and log back in for this to take effect. Or at least that's what
// Quartz Debug says. Who knows, maybe it's lying?
// P.S. Go to [Apple menu --> System Preferences --> Displays --> Display --> Scaled] after logging
// back in, and you'll see a bunch of "HiDPI" resolutions in the list to choose from.

I tried this and have completely lost my display on my MacBook Pro, the only way I can see anything at all is to hook up to an external display and close the laptop screen. Is there a way to reverse this process?

this doesn't seem to affect my air on 10.9.. doing an upgrade to 10.9.3 to see if that the tickie

Super! It works with my Mac mini on 10.9.3 and FullHD monitor.

does not appear to work with rMBP and external display :<

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