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This is all controlled in OS X by the Launch Services database. From time to time, you may notice wacky goings-on that may indicate it's time to rebuild this database. These symptoms can include:

  • "Open With" context menu showing duplicate apps

  • "Open With" showing programs you no longer installed

  • Certain file types open with the wrong application

  • Finder shows the wrong icon for some files

All of these can be repaired when you rebuild Launch Services. To do so, open up Terminal.app (in /Applications/Utilities/) and type (or paste) the following command:
/System/Library/Frameworks/ApplicationServices.frame-work/Versions/A/Frameworks/LaunchServices.frame-work/Versions/A/Support/lsregister -kill -r -domain system -domain local -domain user
Then log out and log back in (or restart). Everything should now be fixed.

Feedback received on this FAQ entry:
  • For Yosemite, the correct command is: [code] /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user [/code]

    2015-01-08 08:49:10 (TamaraB See Profile)

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by rjackson See Profile
last modified: 2005-12-20 15:42:36