I recently updated an outdated OS to Catalina, in which the iPhoto app was replaced by the Photos app. In HD/Users/User/Images, I now find three different folders :
iPhoto-Library (Migrated Photo Library) - 45GB
iPhoto-Library (Photos Library) - 40GB
Photos-Library (Photos Library) - 50GB - contains some 150 more photos than iPhoto-Library - Not sure if the Photos-Library was created automatically or by me.
I know I can open one of these libraries at a time in the Photos app. I also know that in the Finder, I can right-click and access the structure of these libraries. I noticed that they do not have the same folder structure.
My goal is to obtain one Photos-Library containing all the photos contained in the three libraries (including a check so as not to lose possible non-duplicates). Where can I get more information about how to proceed?
On this Stackexchange, I found several questions related to my issue, but I haven't found the exact solution. Some links :
- How to duplicate-check between iPhoto Library and Photos Library *and* move non-duplicates from iPhoto -> Photos?
- If I've migrated from iPhoto to Photos, can I safely delete the migrated photo library?
I have added the file sizes in the list above.
The second linked question indeed answers my question more or less. It seems I can delete the iPhoto-Libraries and keep the Photos-Library.
I still do not understand the difference in file size, and would like to see which photos appear in the Photos-Library but not in the iPhoto-Library (maybe I have imported them before noticing there were different libraries). However, it seems there is no easy way to compare two libraries, as only one library can be opened at a time (except using external software, cf. the first linked question).