Due to various technical limitations on what’s possible with the Photos app, there are some types of items and pieces of information that cannot be copied between libraries by PowerPhotos. Below is a summary of what can and cannot be copied, and some caveats that apply to certain types of items.
Fully supported: photos and videos, keeping keywords, descriptions, titles, dates, favorites, locations, reversible photo edits, bursts, and Live Photos intact; albums and folders.
Partially supported: smart albums
Not supported: faces and projects
Photos and videos with basic metadata: Photos and videos can both be copied from one library to another. In addition, PowerPhotos will also copy each photo’s keywords, description, title, date, and favorite status over to the new library. Photos that are marked as hidden will not be copied, except if you specifically copy them from the special “Hidden” album.
Albums and folders: Both albums and folders will be copied between libraries, and populated with the same photos that they contained in the original library.
Smart albums: A smart album cannot be recreated with its rules intact when copying between libraries. If you copy a smart album, all of the photos in that smart album will be copied to the destination library, and a regular album will be created and populated with those photos.
Original and edited versions of photos: When you edit a photo in Photos, it actually keeps around two copies of the photo: the unedited original, and a new JPG version that contains your edits. This allows you to later discard your edits and revert to the original version of the photo if you wish. PowerPhotos can copy both the original and edited versions of each photo, keeping reversible edits intact in the destination library, as well as RAW+JPG pairs. If you wish, you can choose to copy only the original or the edited version of each photo in the preferences window, rather than keeping both. The original versions of video files will always be copied regardless of the setting you have chosen.
Bursts: If you have used burst mode on your iPhone to take a series of photos that is shown by Photos as a single burst, PowerPhotos can copy all the photos in the burst to another library. The Photos app will let you select your favorite photo from a burst to display separately from the burst. PowerPhotos will keep that photo separated in the copying process as well. Optionally, you can use the PowerPhotos preferences to only copy a single photo from each burst rather than copying every photo.
Live Photos: PowerPhotos supports copying Live Photos, preserving both the photo and the attached video that comes with it. This can be disabled in the preferences if you only want to copy the photo without the video.
Slo-mo videos: slo-mo videos will retain their ability to play in slow motion, but if you have made any customization to the range of time within the video that plays in slow motion, that will be reset to the default of the first few seconds and last seconds of the video playing at full speed, and the middle portion in slow motion.
Locations: Geographic locations can be assigned to your photos in two ways: either automatically by your camera/phone when you take the photo (embedded in the photo’s EXIF data), or manually, by assigning a location to photos using the Info window in Photos. PowerPhotos will preserve these locations in either case when copying photos between libraries.
Faces: Photos does not support assigning face names programatically, so any faces identification that has been performed will not be preserved when copying between libraries with PowerPhotos.
Projects: Photos projects such as books, calendars, and slideshows cannot be copied between libraries.