I have been trying to follow the procedures described on this page:
which has a misleading title, because as well as information on publishing to the app store in also has sections on signing apps for direct distribution.
However I can't get the procedure to work.
What would be really helpful would be a page that is just about signing apps for direct distribution instead of having it all smushed up together on one page, which is consequently very long and difficult to work with.
None of what I have done so far has succeeded in being able to get Xamarin Studio to make a .pkg file that will run on a test Mac device and not trigger the "not from app store or a known developer" message.
I'm wondering if I have misunderstood and Xamarin Studio is not actually able to do this?
Do I need to be using other tools, or is it possible to create a signed .pkg from Xamarin Studio that works with gatekeeper enabled?