Just add an appropriately specced PSU to drive your GPU (eg: 220W Dell DA-2 or ATX PSU) to be able to use it with your TB3 notebook.
EDIT: It's not clear if the lower cost AA vendors are including a TB3 cable with their ADT-Link R43SG-TB3. In which case, consider instead making up the equivalent kit using:
@fiesta5ever How was your experience with the R43SG-TB3 and Mac mini? I have a Mac mini 2018 (i5) and a RX570 that I would like to pair and would need a TB 3 eGPU enclosure, but there are very little used or cheap (new) options in Finland. The R43SG-TB3 looks promising, as I have an ATX PSU also available. I know @itsage has good results with the R43SG and a WAvlink UTE02 but the UTE02 is not easily/cheaply available either. I remember reading that the UTE02 had a TB3 controller that was natively supported with Macs so that could've been a good option, but if the R43SG-TB3 works, it's not a bad deal at around 130 USD.
Mac Mini 2018 (i5-8500B)
No reason why it wouldn't work on a TB3-equipped Mac.
First of all, thanks for the great info here, very helpful for a noob like me.
I ordered the ADT-Link R43SG-TB3 (it's on the way from China), the GPU and Dell DA-2 power supply have arrived and I think I only need the GPU power cable to get started now. Just to make sure, an 8-pin to 6+2-pin extension cable should do the trick, right? The 1060 6GB I have only needs one 6-pin power input. I thought of something like this?
EDIT: Forget about my question, I was not aware that the board was shipped with the necessary cable. 😀
Once I got the build complete, I will post it here.
Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts