Mac quickly show or hide the "hidden" file

"Hidden" files in Unix-like systems and Linux systems are all in dots. That starts with the file name. The same is true in Mac OS. This type of file is not displayed in the default Finder and in various applications. One advantage of this is that many times those "hidden" files may contain important configuration of an application, important data, and so on, if the "unknown" user took the careless modification may affect the operation of the program. Of course, this is also possible through the system settings to determine whether those "hidden" files are displayed. If you want to display the. First file, just execute the following command line in the terminal: Defaults write Com.apple.finder appleshowallfiles-bool YES and then execute the following command to reboot Finder:killall Finder Of course, if you want to hide those files again, just replace yes in the first command with no and then restart the Finder. In fact, in the program's File Save and Open dialog box, if you press command-shift-. It is also possible to quickly toggle the "hidden" file display.