How can I bulk change the names on Photos?

Hi

One way to do this would be to create a slideshow in the photos app, then export the slideshow as a video to be played on the screen.

If that doesn't suit you, then first export from photos to a folder or the thumbdrive. You can then use a free app called Exif renamer, which can rename the files based on the exif data - including the creation date.

https://www.qdev.de/?location=mac/exifrenamer

Do you mean the file names? Or the people names?

Are you talking about names in the photos app, or in folders on your drive?