Ah, we might be getting somewhere. When I tried doing so, my Terminal output displayed an error. I pasted the text below. Any idea how to resolve it? I see that the text mentions macOS 10.12, but I'm running 10.11.
Last login: Mon Oct 21 16:00:44 on console
/Applications/AppInventor/commands-for-Appinventor/aiStarter ; exit;
[0|500] userName$ /Applications/AppInventor/commands-for-Appinventor/aiStarter ; exit;
 Error loading Python lib '/var/folders/2n/rs166rpj4n9_3f8wmmmpdxz00000gn/T/_MEIeejHlD/.Python': dlopen: dlopen(/var/folders/2n/rs166rpj4n9_3f8wmmmpdxz00000gn/T/_MEIeejHlD/.Python, 10): Symbol not found: _getentropy
Referenced from: /var/folders/2n/rs166rpj4n9_3f8wmmmpdxz00000gn/T/_MEIeejHlD/.Python (which was built for Mac OS X 10.12)
Expected in: /usr/lib/libSystem.B.dylib
...copying shared history...
...saving history...truncating history files...
Deleting expired sessions...37 completed.