It gives the following traceback:
Runtime error (ImportException): No module named fcntl Traceback: line 430, in <module>, "/Applications/RhinoWIP.app/Contents/Resources/ManagedPlugIns/RhinoDLR_Python.rhp/Lib/subprocess.py" line 14, in script
This is required by a grasshopper add-on I want to use that calls webbrowser.py which in turns calls subprocess.
This issue seems to have been fixed in the latest revision of IronPython. I tested 2.7.5 (the Rhino one) with mono, and it crashed as well. But with 18.104.22.168 it works.
Any plan to update IronPython soon?