To quickly show hidden files in Mac OS X open up terminal and enter this command. Warning any files that begin with a dot are flagged by UNIX as hidden files. These files can be system or preference files that are required by the system to handle folder and file management. Be careful and cautious before deleting or editing any files that don't look familiar to you. I recommend backing up your system or files before deleting hidden items
defaults write com.apple.finder AppleShowAllFiles TRUE
To hide these files again just change TRUE to FALSE
Though I used Yosemite 10.10 this should work no problem in Snow Leopard 10.6, Lion 10.7, Mountain Lion 10.8, Mavericks 10.9, or El Capitan 10.11
