If you used iPhoto or Aperture before transitioning to Apple’s newer Photos app, up until macOS 12.0 Monterey, Photos has had the ability to migrate your old iPhoto/Aperture library to a Photos library. However, starting in macOS 13 Ventura, Apple no longer supports its migration process, leaving importing the iPhoto library into an existing Photos library as the only option. This is far from ideal, because unlike migration, importing does not retain your album organization, photo edits, or photo metadata in the process.
If you want to preserve all that information from your iPhoto or Aperture library, you can instead use PowerPhotos to convert your old library to an equivalent Photos library. To start, choose the File > Convert iPhoto/Aperture libraries menu item. PowerPhotos will search your Mac for any iPhoto/Aperture libraries it can find, and allow you to add them to the PowerPhotos library list. You can also just drag an iPhoto/Aperture library directly from the Finder and drop it into the library list.
Once the library is in the PowerPhotos library list, you can view it alongside all your Photos libraries, so you can see how many photos it has, what albums it contains, and even view or search the photo metadata, just like with your Photos libraries. You cannot use any functions that modify the iPhoto library, such as deleting duplicates, creating albums, and so forth, but in all other respects you can do all the same things you can with a Photos library.
If you simply want to convert the library to Photos, select the library and click the “Convert…” button in the upper right. This will create a new Photos library and copy the entire contents of the iPhoto/Aperture library into the new library. You can also set up a merge to merge the iPhoto/Aperture library directly into an existing Photos library, or copy individual albums or photos by drag and drop.
PowerPhotos conversion process does differ from the old Photos migration in a few ways.
|Preserves albums, folders, and smart albums
|Preserves folders and albums, converts smart albums into regular albums
|Preserves photo titles, captions, keywords, dates, locations, and faces
|Preserves all the same metadata except for faces
|Converts star ratings and flags into keywords
|Preserves photo edits, but not lossless editing
|Always creates new library alongside original
|Choose any folder to create the new library, or merge/copy directly into an existing library
|Always migrates the entire library
|Allows copying individual photos/albums out of the library as well
|Saves space by linking photos from the old library
|Makes new copies of the photos, requiring additional disk space
|Works only on macOS Monterey and earlier
|Works on Monterey and Ventura
|Does not support libraries before iPhoto 8
|Supports any version iPhoto/Aperture library