Copying photos to a new Mac
I have a Mac from 2013, but now running Catalina and I'm trying to get my photos to a 2019 MacBook Pro.
The trouble is that I can't find the files to copy. I've tried copying the Photos.library and an old iPhoto folder but all I get is a tiny subset of my 8000 photos.
I think the problem is that my photos were originally in iPhoto, then got migrated to Photos when iPhoto went away, but my photos library is somehow fragmented. I can see them all in Photos on the old mac, but I can't find any combination of copying files that gets my photos to the new MBP.
What' the secret guys? What arcane ritual do I need to perform to get my photos?
Thanks!
MacBook Pro with Touch Bar