Quickly re-name several files by using the macOS Finder Renaming contextual menu feature.
As long as the file names are already in the order that is needed, running a couple different options of the Re-Name tool will give you a nice, tidy set of files.
Re-Name with Sequential Numbering
Replace Excess Zeros
When using the numbering option, the default settings create five digit numbers, which is usually a bit excessive for file naming if not necessary. It’s easy to remove them though by running another set of batch renaming using the Replace option.