For users with the “Optimize Mac Storage” option enabled, this could mean a significant portion of your iCloud library would not be visible to PowerPhotos.

Faster library loading: PowerPhotos 2.0 has rewritten a bunch of its internals to load your library much faster than PowerPhotos 1.0.PowerPhotos allows you to break up your Photos.app images among multiple Photos libraries, rather than having to store all of them in one giant library.New duplicate search engine: PowerPhotos 2.0 uses a new duplicate comparison algorithm that can find more duplicate photos which are not quite 100% identical, such as scaled down copies of photos, photos that have been resaved in a different format or with different compression, and even photos with minor edits applied to them.Multiple windows: You can now open each library in a separate window in PowerPhotos, allowing for easier comparison between libraries, and dragging and dropping photos/albums between libraries.Library groups: For those with lots of libraries, you can now organize your libraries into groups in the PowerPhotos sidebar.Global menu bar item: Get fast access to your libraries via a global item in your menu bar even when PowerPhotos itself isn’t running.Set Finder creation/modification dates to the photo’s EXIF date.Optionally include videos from Live Photos and all photos from a burst.Include captions, dates, keywords, and titles in EXIF metadata.Export unmodified photos, or as JPG, PNG, HEIF, or TIFF of different sizes.Export as a flat folder or as a folder hierarchy in the Finder that mimics your album hierarchy.PowerPhotos 2.0 has a new, more fully featured export function with options such as: Advanced exporting: Photos has an export command, but it is fairly limited in what it can provide.In PowerPhotos 2.0, it can now see and work with any photos in your iCloud photo library, and will automatically download any photos from iCloud as needed. You can easily switch between libraries, or just browse the photos in your libraries directly from PowerPhotos, without having to open each library in Photos. PowerPhotos also supports searching across all your libraries at once to help track down a particular photo.

If you use iCloud Photo Library to sync photos with your other devices, splitting up your library can help save on iCloud storage costs.

Use a single library to hold a smaller collection that you sync with iCloud, while keeping the bulk of your photos in separate libraries so they don't take up space on iCloud.

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