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Photos may not be able to detect if it already has those photos in the library yet but doing it during the import has proven to be a reliable solution so just be prepared to do a massive import for now. (4,3000 photos was a little stuttery on my 2012 Mac mini i5 but it did work after being patient) Be patient with it and let it do it's thing but it is working. Notes: Since you mentioned you have 5000 photos, the Mac will potentially become a little unresponsive while you're dragging them into the window. There you have a full library of purely unique photos.DupeGuru Picture Edition: Windows 11, 10, 8.1, 8 and 7: Easy to use for beginners and professionals Smart scanning algorithm Multilingual user interface Available: 7.
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Here's what I did to remove the duplicates quickly and easily.
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