FYI, this block was found back at the launch of the first Thunderbolt 3 Macs to be because Apple (for whatever reason) didn't wish to support the older Thunderb

FYI, this block was found back at the launch of the first Thunderbolt 3 Macs to be because Apple (for whatever reason) didn't wish to support the older Thunderbolt 3 chipset, according to peripheral manufacturer, Plugable: The version of OS X on the new MacBook Pros (late 2016) will not work with existing Thunderbolt 3 docks and adapters that were certified for Windows prior to the release of the MacBook Pro. These existing devices use first generation of TI USB-C chipset (TPS65982) in combination with Intel’s Thunderbolt 3 chipset (Alpine Ridge). Apple requires the 2nd generation TPS65983 chipset for peripherals to be compatible. Certification of solutions across different device types is still in-progress for this 2nd generation chipset. From the Plugable product line, our dual display graphics adapters for DisplayPort and HDMI (TBT3-DP2X and TBT3-HDMI2X) are affected… We’ve also postponed our TBT3-UD1 Docking Station to update to the TPS65983 chipset and re-certify to make this docking station MacBook-compatible. Our Flagship TBT3-UDV dock with Power Delivery/Charging was already planned to use the next generation controller chip from TI, and will be compatible with the 2016 Thunderbolt 3 MacBooks. I still don't think we exactly know why, but the allegations that they're doing it for profit or for some attempt to control the ecosystem don't seem to hold up, especially since most of these peripheral manufacturers since updated their devices with the new chipset to work with macOS just fine.