Importing into Photos: Unable to get metadata I'm switching to using Photos and I'm trying to import all my old photos. I select them all in Finder and drag them into Photos, some import and for some I get the error "Unable to get metadata". However, if I individually select any of the files that gave an error and drag them in, they import without errors.

I still have several thousand to import and I don't want to have to find them individually and drag them in, any idea whats going on?
I managed to work around this issue/bug by dragging the photos from Finder into Photos manually in batches (e.g. 200 or 300 pictures at once).