For some reason my OS X install did not have an instance of the /usr/local/bin directory. This caused the installer to fail.
After I created the directory the installer succeeds but the executable doesn’t have the appropriate execute bits set.
ls -al -rwxr--r-- 1 root wheel 78 Apr 29 20:23 mgcb Jamess-MacBook-Pro:~ james$ mgcb -bash: /usr/local/bin/mgcb: Permission denied Jamess-MacBook-Pro:~ james$
The add-in was appropriately installed for Xamarin and the example projects spooled up correctly.
So glad to see this coming together on ‘day 0’ of the windows release as well!
Happy to help test anything if necessary.