To rename a file, Mac users do the same thing: choose a document, hit Enter and enter new name. This method is great for individual files. When you need to change the names of multiple files at once, users resort to third party apps or rename them individually.
But in macOS, there is a simple and convenient way to batch rename files and it is not about Automator. It’s much easier.
Step 1. Select all the files you want to rename.
Step 2. Click on one of them, right-click and select “Rename objects (X)”.
Step 3. In the opening menu of “Replace text”, select “Format”.
Step 4. Select an acceptable name format, enter a new name and click on Rename.
The rest of the operating system will do automatically.