Apparently the process described below does not work with the XP1. It was worth a try.
First off: I don't have an XP1, I have an X100, and Aperture happily supports my RAW (RAF) files.
That said, I do not open them directly in Aperture, but first have Adobe DNG Convertor turn them into DNGs. Then I import them in Aperture. For me, there are many advantages to this approach...
1) All my RAW files (Nikons, X100; NEF, RAF) are turned into ONE very common open source format (without quality loss). This puts my mind at ease about future compatibility.
2) I don't like Aperture hiding all my files in it's Library... I like to put them in a place that I can choose, using a folder structure that I can choose, etc. If I want to switch to LR tomorrow, I can do so straight away and import my folders, images etc easily.
3) I import in Aperture using 'referenced files'... meaning I can store the master files on a separate HD which is an asset for my backup and storage strategy.
4) When importing images, Aperture does not slow down, I can keep working on my other photos. Adobe is doing the work in the background. "Importing" the referenced files afterwards only takes a second.
This workflow is also described here: http://xposurepro.com/aperture/apert...lt-dng-capture
SO MY POINT IS...
(you've been waiting for this haven't you
This would be a pretty good solution for XP1+Aperture users?
This is a very good and efficient workflow, which I choose even though Aperture supports my X100 files...
Sorry if everyone knew this already. Just wanted to share.