Hi, I enabled iCloud photos on my iphone a few months ago. From that point on, I stopped using iPhoto on my mac. So I have an icloud library for the past few months and an old "archive" iphoto library. My idea is to now merge the two. How can I do it without losing any photos? - If I enable iCloud photo in my old iphoto library, will Photos.app merge the icloud library with the local library? Will I lose all my cloud photos? will I lose all my local photos? - One idea that I had was to enable icloud photos on an empty library so that I can download all my cloud photos, make a backup on time machine, and then try to merge the two libraries without worries of losing anything. How does that sound?