I was virtually stunned by this. Being a Windows user all my life I was so sure Mac would have this useful feature but it did not – the rename files feature has long been implemented on Windows. It works like this.
When you move a file that’s going to be duplicated, Windows system asks you if you want to Rename it or let Windows give it a default name — in which case it adds an ‘_numeric’ to it.
Mac does have this auto-rename feature but only for its Downloads. For instance you downloaded a file using the Safari browser, it defaults the name to ‘_numeric’ if a duplicate file is found. That is a boon because users download a whole lot of stuff and don’t want to be bugged by dialog boxes asking for renaming/replacements or whatever.