Culling and Deduplication are advanced features that can be enabled manually on macOS.
On your Mac:
Open Finder
Go to Applications → Utilities
Double-click Terminal
Or faster:
Press ⌘ Command + Space [to open Spotlight Search]
Type Terminal
Press Enter
Copy and paste the following command into Terminal, then press Enter:
defaults write io.cyme.Peakto ActivateDuplicatesManagement 1Quit Peakto if it’s open, then launch it again.
The Culling and Deduplication features will now be available.