GrannySmith is a new tool from Tyler Hall that can export shared photos and videos from Apple Photos, including their comments and likes. They will be exported in a date-based folder structure to keep them organized. If photos and videos are stored in iCloud, GrannySmith will download the originals.
I also want to point out that GrannySmith does not store or transmit your photos, videos, comments, etc. off your Mac. Everything is done 100% locally. I see none of your data and don’t want to see any of your data. Keep all those cute kid pictures to yourself.
Check It Out: Export Shared Photos and Videos With ‘GrannySmith’