How to write a daemon script for OS X that saves a file in two places?

Question

macOS

We have several users on Mac OS, all working with the same file in turn. It is necessary that after saving the changes, the file be saved from where it was opened and to a special user directory.

Answer 1

developer.apple.com/library/mac/#documentation/Darwin/Conceptual/FSEvents_ProgGuide/UsingtheFSEventsFramework/UsingtheFSEventsFramework.html
hold

Answer 2

I think you can set up Automator here developer.apple.com/library/mac/#documentation/appleapplications/conceptual/automatorconcepts/automator.html