Not obvious how to use it but their support team is very helpful

This isn’t the most obvious piece of software because it has a lot of flexibility but their support team is great about helping you figure out how to use it.

When I first tried to use this I ran into an error adding my Photos library:
Couldnt read the library at path: "/Users/xxx/Pictures/Photos Library.photoslibrary".
Please provide a valid value.
I emailed their support team and they suggested repairing my Photos library (open Photos while holding Command + Option).

At that point I was able to get it to run but PhotoSweeper wasn’t seeing the images that had been imported multiple times from Photo Stream as duplicates. I sent their support team another email and they sent back screenshots and instructions on how to change the settings in the Preferences dialog to start cleaning those out.

graveltech about PhotoSweeper Lite