Fortunately, it’s very easy to add an i Photo library into the Mac Photos app at any time.
Everyone who uses this function must know how to merge i Photo and Photos library on Mac to perfectly execute the merging.
Due to this, a user may find difficulty in recalling images or accessing them.
There are many other instances of loss of photos while transferring or merging the library.
There are some third party applications that allow users to merge, import and manipulate the i Photo library.
These may not be good for your system or your photos.