Camera Raw location on a Mac:-
Hard Drive/Application Support/Adobe/Plug-Ins/File Format/CS6
or
Hard Drive/Application Support/Adobe/Plug-Ins/File Format/CS5
or
Hard Drive/Application Support/Adobe/Plug-Ins/File Format/Elements
NOT within the User section at all!
and if you update one Camera Raw you can, of course, copy and paste to alternative versions of Adobe products (as if, for example, you have both CS6 & CS5, or Elements)
North America
Europe, Middle East and Africa
Asia Pacific