Permissions: SpecialFolder.SharedApplicationData

I’m trying to store some files needed for my application in a sub-folder of SpecialFolder.SharedApplicationData. When the app first launches the required directory doesn’t exists so I’m trying to create it. I can’t (permissions).
The previous author of the code I am working on had an installer to build this. I don’t want an installer (not very Mac-like). Is there a way to authenticate or something so that I can have the application gain permission to write to this directory?

I suspect I’ll have an issue on Windows too, but I’m not there yet.

RSVP!
Thanks.

Solved it on my own. I was trying to use the shared user folder, not the shared application data folder (which is not the same thing).
RTM, Halford…