When you right-click (or control-click) on a file in the Mac OS X Finder, you get a contextual menu with a nice “Open With” option, which lets you open the selected file with any Application that you desire to.

That is pretty nice until that menu gets all clogged up with all sorts of old/broken apps that you don’t use any more.

Due to some caching mechanism, it seems that this menu never cleans itself up :/

So here is how to reset it:

1. Open a Terminal window (by running the “Terminal” Application)
2. Copy/paste the following command: (all on one line)

   Code

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

3. Click on the Finder icon and relaunch the Finder (or log out and log in again)

Your ‘Open width” menu will now be all clean… and will start to fill up again as you run/install apps that register themselves there…