Sat, 02 Dec 2006
Show hidden files in Mac OS X Finder
Execute the following in Terminal (to undo the change setBy 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.
TRUE to FALSE).
defaults write com.apple.finder AppleShowAllFiles TRUE killall Finder

