RizomUV to Maya Bridge

When I try to send a mesh from Maya 2018 on MacOS X High Sierra, I get this error:

# Traceback (most recent call last):
# File "<maya console>", line 15, in sendToRizom
# File "/Applications/Autodesk/maya2018/Maya.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python2.7/subprocess.py", line 710, in __init__
# errread, errwrite)
# File "/Applications/Autodesk/maya2018/Maya.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python2.7/subprocess.py", line 1335, in _execute_child
# raise child_exception
# OSError: [Errno 2] No such file or directory #

and when I try Automatic Roundtrip I get this error:

# Traceback (most recent call last):
# File "<maya console>", line 53, in rizomAutoRoundtrip
# File "/Applications/Autodesk/maya2018/Maya.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python2.7/subprocess.py", line 522, in call
# return Popen(*popenargs, **kwargs).wait()
# File "/Applications/Autodesk/maya2018/Maya.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python2.7/subprocess.py", line 710, in __init__
# errread, errwrite)
# File "/Applications/Autodesk/maya2018/Maya.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python2.7/subprocess.py", line 1335, in _execute_child
# raise child_exception
# OSError: [Errno 2] No such file or directory #

I installed and set everything up per the install instructions. Any suggestions? I am evaluating this before I purchase and so far…not starting off on a good foot.