Starting point for UnrollSrf

Sorry, It’s one of the first time I’m on rhino.
I have rhino for mac, with python run RunPythonScript working (I think).
I’m drawing a sphere with Solid > Sphere > Center, radius. Then I run the python script MultiUnrollMac.py and I can’t select the sphere. If I press enter few times I get the error:

Exception Occurred
Message: Local variable 'tempGroup' referenced before assignment.

Traceback:
  line 75, in MultiUnroll, "/Users/alberto/Downloads/MultiUnrollMac.py"
  line 84, in <module>, "/Users/alberto/Downloads/MultiUnrollMac.py"

Sorry I’m really new to rhino