Follow the steps below to display the full file path within Finder window title bars as you navigate your mac.
defaults write com.apple.finder _FXShowPosixPathInTitle -bool YES
Now kill the Finder to see the change take effect.
killall finder
And if for some reason you need to revert this change, that's done by simply switching the YES
to a NO
in the cmd above.
defaults write com.apple.finder _FXShowPosixPathInTitle -bool NO
killall finder