Use Finder To View Hidden Files
From Lifehacker:
By default, Mac OS X’s Finder keeps system files - which generally start with a dot, like .bash_profile - out of your sight.But that makes editing one of these files extremely difficult if you, say, want to customize your Terminal prompt. To do so without firing up vim (if you don’t know, don’t ask), set Finder to show all hidden files. OS X FAQ has the details on how to do it.
Tags: Mac OS X, Apple, Finder, Hidden Files, Command Line