I personally batch-rename photos most often, but it works for any files you have.
How to search and replace certain words in the name of specific files on Mac.How to add text to currently named files on Mac.Here's how to batch-rename files on your Mac. Finally, Apple realized our heartache and created a much simpler way to rename multiple files at once, and it's only gotten easier as macOS updates continue.
Others tried workarounds to rename files in third-party apps. Prior to OS X Yosemite, there was no simple way to rename multiple files at the same time on the Mac.