I've shot AVCHD 1080p60 and 1080i60 movies and either do not show up. Even though it's written that 1080i60 files should be recognized. Maybe the support for the RX100 is still be worked on. I know Aperture and Lightroom don't support Sony RX100 RAW yet either.
Aperture 3, Mac OS X (10.7.4), Upgraded to Aperture 3.3.2