MAH MINECRAFT FOLDER IS GONE!!! (MAC)

Okay, I'm looking for my minecraft folder in Library>Application support (Where i usally find it.) And its not there....i fugure i over looked it but its still not there.


So i run minecraft and it comes up saying "Would You Like To Update?" I click "Yes"
Then it comes up with an error because the bin file ist there!!! I knew i didnt over look it. but if i do have to re-install it, will my worlds still be there??? (DANG IT. IF IT ISNT IM GOING TO BITE SOMEBODYS HEAD OFF. )


Soo wut do i do??? I really want to play minecraft...