Question re project organization

[William Prothero]

Folks:
I’d like some advice on project organization as I take my app to the next step. I am creating a standalone that will work on Mac and Windows, possibly future modification to mobile, but not for now.

I have a basic app where the use can access information about the Earth, and want to the user be able to add downloadable code modules. The basic app has resources that will be used by additions that will provide challenges and information and will use the basic app for data. So, it’s kind of like a splash app. Specifications and descriptions of downloadable additions will be stored on a database and the use can choose which ones are wanted. 

So, given Apple’s sandboxing requirements, where should the downloaded parts be put? Is the MacOS folder the correct place? In Windows, would it be the same folder as the exe?

Tnx for any wisdom.
Regards,
Bill

William A. Prothero
http://es.earthednet.org/