For MooseEdit, AFAIK the data path in OSX should be something like:

C:\Users\<UserName>\Library\Application Support\Steam\SteamApps\common\Divinity - Original Sin\Divinity - Original Sin.app\Contents\Data\

In the Steam library, if you right click on D:OS and select Properties, switch to the Local Files tab and click the 'Browse Local Files...' button, it will open Finder at the install folder. That should identify where the Data folder is, and hopefully let you copy the full path, or at least see it so you can browse there through MooseEdit.


To try playing the game from a different account without reinstalling, try browsing to the install folder for your current user account, right click the 'Divinity - Original Sin.app' file and select 'Open Container', browse to the 'shipping' folder and launch the EoCApp.exe executable. If needed, copy the app file to another location first, where both user accounts have full access.