I’m having similar build problems trying to build Rama’s Victory Blueprint Library plugin. The error code my Xcode gives me is
ExternalBuildToolExecution UE4Editor\ -\ Mac
cd /Users/Shared/UnrealEngine/4.9
export ACTION=
/Users/Shared/UnrealEngine/4.9/Engine/Build/BatchFiles/Mac/RocketBuild.sh UE4Editor macosx DebugGame
Setting up Mono
Building UE4Editor...
Creating makefile for UE4Editor (no existing makefile)
Performing full C++ include scan (no include cache file)
Compiling with MacOSX SDK 10.10
ERROR: Rocket: No modules found to build?
Command /Users/Shared/UnrealEngine/4.9/Engine/Build/BatchFiles/Mac/RocketBuild.sh failed with exit code 5
It gives me this error regardless of whether or not Rama’s VBL plugin is present in the project directory. However, with the plugin installed in the Plugins folder in my project directory, launching the Editor gives me an error as described in the OP.
Build target and destination:
PS
I run Mac OSX 10.9.5. The base SDK says it’s for OSX 10.10. I’ve tried switching it to 10.9, but it has exactly the same result.