Can anyone offer info on why/how to upload raw files from Nikon D610 to latest version of aperture?

I just upgraded to the latest operating system AND Aperture software program so I could import raw files from the Nikon D610, but the files are still being imported as unsupported image format. Is there a setting that I need to set to get this to work? I can't believe I spent all day upgrading the operating system and then my old version of Aperture, only to find out it still won't support the raw files from my new camera. Anyone else having this problem?