I just did a system software update to the latest version of 10.11 to 10.11.2 and now I cannot launch system preferences from the apple menu. I can launch it from the dock or the applications folder. Anyone have an idea as to what is going on? I have deleted plist files, booted into safe mode... no luck. Totally strange... When I click on the system preferences menu item, I see the dock move slightly to the left but nothing opens or loads. Any help would be much appreciated!