Gemini
I use Gemini to get rid of duplicates. I haven't used it with Aperture as I don't have any duplicates in my Aperture library (that I know of).
Here's a clip from the Gemini FAQ section. Confusingly it mentions Aperture and then focuses specifically on iTunes and iPhoto.
Maybe a bit more research may give you the answer you need.
I use Gemini to get rid of duplicates. I haven't used it with Aperture as I don't have any duplicates in my Aperture library (that I know of).
Here's a clip from the Gemini FAQ section. Confusingly it mentions Aperture and then focuses specifically on iTunes and iPhoto.
Maybe a bit more research may give you the answer you need.