Fujifilm has announced its X Raw Studio Conversion System software, which it first teased back at Photokina. The software is essentially a viewer for the in-camera Raw converters that already exist on X and GFX series cameras. In fact, the software doesn't actually do any processing - the camera does, over a USB connection. Fujifilm claims that X Raw Studio is more than twenty times faster than the SilkyPix-based converter. The macOS version is available for download today, with a Windows application to follow in February.
The software adjusts exactly the same parameters as on the camera and supports batch processing and saving conversion profiles. As you'd expect, a side-by-side viewer is available. As of today only the GFX 50S and X-T2 are supported, with the X-Pro2 and X100F to follow in December, all via firmware updates.