How to batch change filenames in a second Photos library

Photos scripting cannot target a library by name. It always acts on the open library. Open “Photos Library 2.photoslibrary” manually (Option-launch), then run your batch filename-to-title script. This is the only Apple-supported method.

That can be accomplished by the following:

1 - download the AppleScript Script: Changing the Title to the Filename without Extension.

2 - open Script Editor, import the code, compile and save as an application.

3 - open the second library.

4 - select the photos you want to batch change.

5 - double click on the created app to run the script on the photos.

6 - when you need the photos outside of the library with the new filename export it using the Title as the new file name.

If the file names are already what you want use this AppleScript: Script: Batch Changing the Titles to the Filenames with Extension

They both work fine with Sequoia and earlier.

The Apple scripts for batch changing titles that I know of are targeting the Photos.app - they contain lines like "Tell application Photos to ... "

To use them you have to open the library you want to modify in Phoots, a pointed out by

azaksalmarzur28, then select the photos in Photos, where you want to change the titles and run the script.

léonie: The poster wanted to use the filename for the title (I think.) I wonder if scripts would use the original file name or the GUID filename-- which doesn't look at all like what is probably expected. Do you know?

I just tried using Photos Workbench to change titles, and the filename it uses is the unique identifier.