I registered to this forum to support rickp: I am a reasonably competent Apple developer, and the way this is provided for MacOS is utterly non professional. It is not true that installing an application on MacOS requires administrator privilege. There are standard ways to do this on the MacOS platform, that Xygrib deliberately violates. This is not acceptable. And saying here that users can always go back to the source is so full of spite and arrogance, I will not even comment on that.
So please take a step back: getting and using user land software should not require admin privilege. This is definitely true on Mac. Simply provide a .dmg containing the app. Then the user can choose to drag and drop it wherever she wants.