FUJIFILM Corporation (President: Shigehiro Nakajima) has been working to improve image processing of X-Trans and EXR-sensor based raw captures. X-Trans CMOS has a new type of sensor filter array developed by FUJIFILM to improve image quality.
OS X is now supporting FUJIFILM X-Trans RAW. Applying the Apple Digital Camera RAW Compatibility Update to OS X, iPhoto and Aperture will be able to handle FUJIFILM X-Trans RAW of X-Pro1, X-E1, X100S, and X20.
Please refer the following link for more detail.