Canon EOS 6D - Unsupported Image Format

Hi,

when I import RAW pictures from my Canon EOS 6D to the library, Aperture shows me this message: "Unsupported Image Format".

I updated Aperture to the last available version (3.4.3 - Digital Camera Raw 4.00 - Build 658.1) but nothing changes.

Any ideas?

Thank's!

Luigi