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. Right click the area you want to paste the picture, then select paste. Or you right click on the picture then click copy. How to copy and paste pictures on mac How do I copy and paste pictures You need to highlight the picture and do command+c and command+v. Notes: Since you mentioned you have 5000 photos, the Mac will potentially become a little unresponsive while you're dragging them into the window. Regardless of how the duplicates were created, lets see how you can find and remove these duplicates from the iPhoto app on your device. Where does iphoto backup go on mac Similar Questions.

There you have a full library of purely unique photos.

During the import you will be prompted to choose what you want to have done for duplicate photos and it will show you the first two identical photos that it has found, select 'skip' and 'apply to all'.

Open that new empty library in photos and drag everything (using CMD+a in finder) in that exported folder to the Photos.app window.

Close photos and create a new photos library.Export your entire photo library to a folder.Here's what I did to remove the duplicates quickly and easily.

How to remove duplicates in iphoto