Har inte själv tagit bort mitt iPhoto-bibliotek för att vara säker, men enligt den här länken så går det bra att ta bort det.
http://www.imore.com/photos-os-x-faq
Dock är här lite mer avancerat än man kan tro. Som jag förstår det rätt så har du inga dubletter även om du har två bibliotek, alltså finns det ingen större anledning till att ta bort sitt iPhoto-bibliotek.
Citat:
Can I delete my iPhoto or Aperture library after I import my photos into Photos for OS X?
Yes, though you don't need to. Through the magic of symbolic links (older users might also know these as aliases), your masters have all been moved to the Photos library, but your iPhoto and Aperture libraries still work because each photo has a symbolic link to the Photos master. Though it may appear in the Finder that both libraries are taking up the same storage capacity, only one library — your Photos library — has the majority of the data. Apple has a support article written about this under-the-hood magic if you want more information, but the short answer is: If you don't want to use iPhoto or Aperture anymore, feel free to delete your original library. If you still might want to pop back into iPhoto or Aperture, keep that library. It won't actually take up extra disk space.
