Photo numbers
How do I get Photos to display the picture number under each picture?
Mac Pro, macOS Sierra (10.12.6), MacPro 5,1, with 2.8GHz quad-core
Question marked as
Upgrade to macOS 10.14 Mojave and Photos 4.0.
In the View menu enable the option "Metadata > Titles".
In Photos 4.0 you will see the filename of the photos below the thumbnails, if a photo does not have a custom title. In older versions of Photos only the custom titles are shown below the thumbnails.
For example, in Photos 4.0 on macOS 10.14.1 Mojave: