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Last active December 9, 2015 19:49
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Remove duplicated & old items form "Open with..." menu in Mac OS X (Mountain Lion included)
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gistfile1.md

In terminal:

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/\
LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local\
-domain system -domain user

Then restart Finder: Alt + Right Click on Finder icon, then select Relaunch (at the menu's bottom).

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