I probably can't help much because I do not understand the backend requirements of embedXcode.
But I'm guessing it's assuming a specific environment, so here is what I have set up:
1/ macOS 10.13.1
2/ Xcode 9.2
3/ Arduino 1.8.5 - installed in /Applications
4/ Energia 1.6.10E18 installed in /Applications
5/ Cut / paste example sketch from Energia.
6/ Select Build target, run.
7/ Select Upload target, run - watch your LEDs start blinking.
Hope you have some luck, the embedXcode environment is very impressive.
I was getting ready to code at the Code Composer Studio level but the Energia/Arduino Sketch framework makes development so much easier.