The Razer Core has TI82 controller which is officially unsupported in macOS. There's a workaround to make it compatible (search for TB3-enabler script). It should work with both TB2 Macs through the Apple adapter and 2016 MBP in Windows only.
Newer Thunderbolt 3 enclosures will have the TI83 controller which is officially supported in macOS. However, Apple has software blocks in macOS to prevent external GPU through Thunderbolt 3 connection. There's no successful solution I'm aware of atm.
TI83 controller box such as the AKiTiO Node works in Windows. Here's my early testing using a Node with a 13" non-touchbar MBP. The eGPU is able to power the internal display.
Thanks! Now I just need to know if the core work without external monitor in macbooks that have discrete graphics.