Show / Hide Hidden Folders and Files on MAC OSx

Show All Files

Open Terminal, located at /Applications/Utilities/.

Enter the following into your terminal one line at a time.

1. defaults write com.apple.finder AppleShowAllFiles TRUE
2. killall Finder

Hide All files

Open Terminal, located at /Applications/Utilities/.

Enter the following into your terminal one line at a time.

1. defaults write com.apple.finder AppleShowAllFiles FALSE 

2. killall Finder