Unable to show hidden files on Mac I just received a new MacBook, running OS X El Capitan 10.11.5, from my new employer and I am unable to force hidden files to show in Finder.  This is my fourth MacBook, and in the past I have always used defaults write com.apple.finder AppleShowAllFiles YES to show hidden files; however, on my new Mac, this is not showing the hidden files. I also tried defaults write com.apple.finder AppleShowAllFiles TRUE but still cannot see hidden files in Terminal or in Finder.  I restarted my computer, but that didn't solve my issue either.  Any ideas on how to show my Mac's hidden files?
Try this:

defaults write com.apple.Finder AppleShowAllFiles -bool true; killall Finder


This sets AppleShowAllFiles to true which tells Finder to show all file. Note the -bool part, that tells will make sure you are setting a Boolean to it instead of string, integer etc. Finally it restarts Finder.