Duplicate Photos Fixer Pro

I do not often proceed to write reviews; but this time, I feel compelled to.
I just migrated my Aperture Library to Photos version 1.5 in El Capitan 10.11.6 and somes of my originals did not follow the obvious path!
…and I ended up with "double originals”.
Perhaps I also had some despite my meticulous care.
Anyhow, Duplicate Photo Fixer Pro showed me some 359 duplicates on a library of almost 20,000 originals; I am impressed!
…and all that within some 20 minutes or so...

Peherte about Duplicate Photos Fixer Pro, v1.9.1