Here is a quick how to show hidden files and folders in OSX Mavericks 10.9.
Using the terminal, do the following command to show a specific hidden folder. This example assume you want to display the “Library” folder contain in your user profile :
sudo chflags hidden /Library/ ~/Library/
If you’d like to show all hidden file and folders system wide, just do :
defaults write com.apple.finder AppleShowAllFiles -boolean true
And then reload Finder :
killall Finder