This directory should be created when you link the app to dropbox and it should get created at ~/Dropbox/Apps/MobileOrg due to how Dropbox handles app permissions.

If you're experiencing issues, watch for a new release. We're beta testing now with the v2 of the Dropbox API

On Tue, Dec 13, 2016 at 8:15 PM Greg Troxel <gdt@lexort.com> wrote:

Matthew Pritchard <wintermute24x7@icloud.com> writes:

> The mobile org manual says to create a directory (set
> org-mobile-directory “~/Dropbox/MobileOrg”)

That is not creating it so much as configuring org to use it.

> Can I create this directory with a simple command instead of a lisp
> command?

I am not sure if the directory has to exist or not.  Probably that's
because getting an error that it does not and running mkdir is not hard
and easily forgotten.