There is also a great Name Mangler Google Group where you can get your questions answered and some very advanced features and methods get discussed. All of that plus being able to use Regex to build very complicated renames. Once of the many things that makes using a tool like Name Mangler valuable is that you can undo your changes, view a history of your changes, and create a 'droplet' that make running the name change on other files really convenient. Under 'Replace with' enter the character you want to replace 'This is the photo that your background will change to whenever you run this routine. Click the Add button, then navigate to the photo you want to map to this routine. In the search bar, type Get Specified Finder Items and drag the corresponding action into the editor. Drag all of the folder you want to rename into the panel where it says 'Drag Files and Folders Here' Open Automator and create a New Document with the Quick Action type.

Once you have Name Mangler installed, launch it.Here is Name Mangler on MacUpdate which includes links to many similar programs.

There are free options out there, but Name Mangler offers a ton of features that make it well worth the $19.00 to me. I use Name Mangler 3 for file and folder renaming.

Mass change date with automator mac