If these duplicates are created, and they exist in different folders, some applications will show different errors. Ditto is a command-line tool developed by Apple that lets you create and manage file copies and merge files on Mac. Learn how to use it to merge folders with the help of Terminal. Terminal Source: Mac sales · 4. How To Merge Folders on Mac with the help of Submodules: Nov 16, 2023 — Submodules is a feature for Mac OS X that allows multiple file types to coexist in the same folder. You can have a Submodule for a text file, a PDF file and one other type of file to avoid any issues. When a file gets updated, any open Submodules are updated automatically. The command to use Submodules depends on what type of files you want to merge. If you want to merge text files, use the ditto command to change the files in the folder, then delete the Subpartitions. If you want to merge PDF files, use the mac PDF command to change the files in the folder then delete the Subpartitions. Terminal Source: mac sales · 5. How To Remove Duplicates in a Directory — Command-line command “ditto” — Nov 2023 — If you are working on files in more than one directory you can make ditto command an efficient way to remove files from one directory and add them to another location in the same directory. When you run the command-line tool after you open a file from the first location, it creates a temporary folder to hold the file. When you launch the file in the second location, it will create a directory with all your files inside it. Using “ditto” command, when a file has a duplicate in it, it will not be automatically deleted. Instead, you have to run the command, “DN. “. Then, all previous duplicate files within the file will be removed, leaving only the first one(and its directory). It's then up to you to tell ditto to remove the previous file(s). As a safety measure, if you use ditto for many operations, you should keep a file history of what you've deleted, so you can recover the deleted files when you need them.