Small exported images after migrating from Aperture to Photos

Hi léonie, It looks like you have nailed it. I have been playing around with new libraries, RAW files that were present in the problem library, edited photos from that library, newer RAW photos that I use with Lightroom, etc over the last week. The problem photos are always ones that were previously edited in Aperture. It seems you are correct that the migration does not bring with it those edits very gracefully, but at least they do come over so I can see what I did to them previously (end result-wise anyway) Luckily in my case, I long ago exported all of these edited versions, and they already live in my system photos library / iCloud. My Aperture library remained as an archive of sorts. I doubt that I will need to go back and export already edited files ever again (well, never say never), but at least in the rare case that I need to get in there and at them, I know that the originals are intact and I can re-edit them as needed in Photos going forward.

Hi Old Toad, thanks for your reply. In my various tests over the last week, the only situation that resulted in a smaller-than-expected file was a library migrated from Aperture where a photo, previously edited in Aperture, was exported as the current version. Originals seem to be intact. While not ideal, this is OK for my purposes. My Aperture library served as a archive location for all my RAW files only. I always export the finished product into Photos, which I now contunue to do using Lightroom (partly because Aperture was discontinued but more so because Aperture never understood how to read the RAW files from my current camera. I am reasonably satisfied knowing the originals are all in good shape, and I can store this migrated library away in case I ever need to access those originals again.