How do I access the same 'world' in different OSX user accounts?

Solution 1:

You could try retrieving the folder which houses the world files generated upon creating it.

Open up "spotlight" and type Library/Application Support/minecraft. A finder window should show up. Navigate into the "saves" folder and you should see your world in there (folder names are world names)

From there, copy the world folder (cmd + c) then, in the finder window, press the menu option "Go" then "Go to folder". In the text box, type /Users/ and click "Go".

You should see a folder in the finder window called "Shared". Paste the minecraft world folder into that folder, log in to your other account, go to the "Shared" folder and copy the world file again, then paste it back into the "Saves" folder which was in the first step. (Spotlight, library/appplication support/....")

You should be able to access that world on both accounts now. Have fun if it did work.

EDIT: To accommodate for a comment, a real neat trick would be to just have minecraft files in the shared folder. The only source I looked at for this was another question here: Change Minecraft save location?

This basically says, there's an option in the launcher (before you start the game up) which says you can change the directory of the games files to another location. (i.e in the shared folder) so the world will be updated for both accounts. Only if you're going to be playing minecraft on both accounts I guess! worth a shot