Olivier,
what is your Aperture version? And is your profile signature Mac OS X (10.4.10), still current?
All cameras currently supported by Aperture 3.4.3 are listed here:
Apple - Aperture - Technical Specifications - RAW Support
There are not yet many supported Fuji cameras. Even when the raw support for your new camera will be released, it will probably only be available for the newest Aperture version, not for older versions compatible with Mac OS X (10.4.10).
Regards
Léonie
If your camera's raw cannot be supported, you might consider to convert the raw to another lossless format, Tiff, PSD, or DNG - using the software that comes with your camera, and to use these converted images in Aperture.