Finding Multiple Files at Once
I found the answer here:
https://www.reddit.com/r/applehelp/comments/1qk525/how_do_you_search_for_multiple_items_all_at_once/
This worked for me:
Use the free software called EasyFind
- Drag and drop your root folder in the window to set the source
- Copy paste the list of photos you're looking for (you'll only see one in the box but they're all there if you arrow up/down.
- Select "Any Word" in the options on the left
- Hit enter to search
- Select all the items in that list and copy (option+drag) or move them (drag) to a folder in finder.