====== Comandos para ver carpetas en Finder ======

===== Ver carpeta Library =====

  chflags nohidden ~/Library/

  chflags hidden ~/Library

http://osxdaily.com/2011/07/04/show-library-directory-in-mac-os-x-lion/

===== Ver carpetas ocultas =====

  defaults write com.apple.finder AppleShowAllFiles -bool YES
  
  killall Finder


  defaults write com.apple.finder AppleShowAllFiles -bool NO
  
  killall finder

http://www.macosxtips.co.uk/index_files/quickly-show-hidden-files.php