I'm on Linux, so Lightroom wasn't an option for me. I noticed that none of the tools I could find supported this, so I picked the one I liked best and added support myself.
https://github.com/Sitwon/dt_fujifilm_ratings Darktable is an open source Lightroom alternative. My script relies on ExifTool to detect the ratings in the RAF or JPG files (because if you shoot in RAW+Fine, the ratings are only written to the JPG file), but once installed you can just import like normal in Darktable and my script will be triggered to apply the in-camera ratings.
