Finder Unhide all files and folder.

1) open the terminal ,

2) type in the code below to unhidden files and folders

Showing hidden system files:

Code:

defaults write com.apple.finder AppleShowAllFiles TRUE

killall Finder

to Hiding them;

type the same code below at terminal.

Code:

defaults write com.apple.finder AppleShowAllFiles FALSE

killall Finder

Careful, they're hidden for a reason.