Show system files / Show git ignore in osx
Open the terminal and type
on OS X 10.8:
defaults write com.apple.Finder AppleShowAllFiles TRUEon OS X 10.9:
defaults write com.apple.finder AppleShowAllFiles TRUE
Then you must relaunch finder:
killall Finder
Any file name in OS X prefixed with a '.' is considered "hidden".
You can use the shortcut in Finder:
Command + Shift + .
It will show the hidden files. To hide the files again, use the same shortcut.