In Mac OS X, some applications will install as a System Preferences pane. You can’t drag these to the trash like most applications. So how do you get rid of them?
Hold down the control key and click on the preference pane. This will display a menu with one option, Remove “Name of Application” Preference Pane. Click on this menu option (the only option) and the pane will be removed from System Preferences. Voila!
Nick Momrik 
Thanks for this great and effective tip! This helped me remove a Pref pane that locked up all the time.
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I Googled for ‘mac remove system preferences’ and this was the 2nd hit. Great tip 😉
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I just want to specify that in Snow Leopard you have to right-click on the pref pane in order to access the menu option for removal.
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I googled how to remove a system preferences pane in mac osx, nd this was the first. thank god you made this, or i would have to keep many unwanted applications
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