Aperture is supporting quite a few Fuji cameras, see: http://www.apple.com/aperture/specs/raw.html
- FinePix S2 Pro
- FinePix S3 Pro
- FinePix S5 Pro
- FinePix X100**
Only for the newer cameras the raw support has been released as part of the newer operating systems. You need Aperture 3.4 or later to be able to use the raw support for the X-series cameras.
Since you are running OS X 10.9.2, you could update to Aperture 3.5.1 and use the raw support for the Fuji X-E1. I expect, that any raw support for the successor Fuji X-E2 will also be released for the current Aperture version and not the older Aperture 3.2.1.