显示全路径的方法
defaults write com.apple.finder _FXShowPosixPathInTitle -bool TRUE
killall Finder
恢复默认方法
defaults delete com.apple.finder _FXShowPosixPathInTitle
killall Finder
defaults write com.apple.finder _FXShowPosixPathInTitle -bool TRUE
killall Finder
defaults delete com.apple.finder _FXShowPosixPathInTitle
killall Finder