I've had to convert the RAF files into JPG ones: http://www.fujifilm.com/support/digital_cameras/software/#studio
At least, for my HS30EXR there is no support for RAF (Fuji RAW) files
I hope this helps!!
P.D.: You'll see other conversion and software from Fuji such as the FinePix Viewer... wich is not supported by 10.7 I'm afraid
It does not appear that your camera is supported - http://support.apple.com/kb/HT4757 - until it is you will have to use another program to convert to JPEG - FujiFilm shuld supply one and adobe has one
You can use this Automator workflow application to convert the RAW file to a jpeg file: Convert to JPG and Embed sRGB profile. You can download it from Toad's Cellar. I've used it on RAW files from Canons and Nikons. Be sure to use it on copies of your RAW files and it converts the file and removes the original.