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