A forum user using MacOS reported that it is difficult to manually install mods which merge directory contents. Apparently on MacOS by default copying/extracting into a directory replaces, not merges, the directory contents. (!)

Since KHUBS and KPORTS both install into GameData/KipEng, and, even worse, only split the difference inside the Parts folder, this causes problems.

We can partially alleviate this issue by moving the data as follows:
KHUBS:
GameData/KipEng
+- Agency
+-KHubs
+-Parts\

KPORTS:
GameData/KipEng
+- Agency
+-KPorts
+-Parts\

Linked issue: mwerle/KipDockingPorts#3