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View hidden files and folders in Finder. | mac geekery:

View hidden files and folders in Finder.
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December 3, 2004 - 11:04am
As you know, the Finder hides the standard Unix files and folders from you. You can 'Go To Folder...' and type in the name of the folder such as /var/log, but that's fiddly and you still don't see the 'dot' files, so for any serious session, it's probably easier to drop into Terminal. Except, there's a terminal command that will make all files and folders display in your Finder. defaults write com.apple.finder AppleShowAllFiles -bool true et voila