Il tuo problema può essere risolto utilizzando "Azioni cartella". È possibile creare azioni cartella utilizzando AppleScript o Automator. Se non sai cosa sono le "Azioni cartella", puoi leggere la Cartella Pagina di riferimento delle azioni sul sito Apple per iniziare.
Folder Actions Reference
Folder Actions is a feature of OS X that lets you associate
AppleScript scripts with folders. A Folder Action script is executed
when the folder to which it is attached is opened or closed, moved or
resized, or has items added or removed. The script provides a handler
that matches the appropriate format for the action, as described in
this chapter.
Folder Actions make it easy to create hot folders that respond to
external actions to trigger a workflow. For example, you can use a
Folder Action script to initiate automated processing of any photo
dropped in a targeted folder. A well written Folder Action script
leaves the hot folder empty. This avoids repeated application of the
action to the same files, and allows Folder Actions to perform more
efficiently.
You can Control-click a folder to access some Folder Action features
with the contextual menu in the Finder. Or you can use the Folder
Actions Setup application, located in /Applications/AppleScript.
Nota: puoi creare le tue "Azioni cartella" utilizzando AppleScript Editor o Automator.