Precompiled rules assembly '/Users/unity/Library/Application Support/Epic/UnrealEngine/Intermediate/Build/BuildRules/MarketplaceRules.dll' does not exist.
Window下找到该DLL
拷到Mac对应的目录下即可。如没有则需要手动创建相应的文件夹
/Users/unity/Library/Application Support/Epic/UnrealEngine/Intermediate/Build/BuildRules/