This post will show you how to easily show all hidden files in Finder, both with a Terminal script and a keyboard shortcut.
To show hidden files in OS X, you can type the following in the Terminal:
defaults write com.apple.finder AppleShowAllFiles TRUE killall Finder
This will reconfigure and restart Finder, which upon a restart will now show you all hidden files. To hide these files again, just run this command:
defaults write com.apple.finder AppleShowAllFiles FALSE killall Finder
An even easier way is to use the keyboard shortcut
Cmd+Shift+., which toggles
the visibility instantly. No Terminal hacks required.