Just saw this and looked into it on Sony website
This utility updates the ILCE-7RM2 system software to version 3.00, and provides the following benefits:
Improvements over version 2.00:
Improves 4K movie recording time when using the vertical grip (VG-C2EM) or when the APS-C/Super35mm mode is activated
Improves picture quality
Benefits provided by previous updates and included in version 3.00:
Adds the selectable feature for uncompressed 14-Bit RAW image capture
Adds support to output video via HDMI during use of the Remote Camera Control software (still mode only)
Reduces the chance of the camera changing to front focus when shooting certain scenes.
Note: This symptom rarely occurs.
Decreases chroma noise when Long Exposure NR (Noise Reduction) is set to Off.
Note: The noise does not occur when Long Exposure NR is set to On.
Improves continuous shooting at Hi speed so that it can be used just as long when using the flash as without the flash
Here is the link for the A7rII with Mac. Also supports the A7sII as well
Sony eSupport - ILCE-7RM2 - Support