For any of you power-users moving from Windows to MacOS X behind me, another thing you’ll want to know is how to get the Finder to show hidden files (those that begin with a period). 
Open a Terminal windows and type:

defaults write com.apple.finder AppleShowAllFiles TRUE
killall Finder

The first line changes the setting in Finder. The second line closes all open Finder windows, so that Finder will restart with the new configuration the next time you open a new window.

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