Hi Claas, you mention granting access - do you have any unusual set of file or folder permissions set on your machine? Are you running any kind of low level system utility like a virus checker possibly?

One thing you can try is to install the latest X11 from here: http://xquartz.macosforge.org/landing/ if that current XQuartz release will launch ok for you, then try setting MoI v2 to use the system XQuartz and see if that helps anything. You can reach the setting for that by right-clicking on the MoI .app and pick "Show package contents". Then inside there run Wineskin.app, and click the "Advanced" button and go to the "Options" tab, and then the settings to mess with are the bottom 2 checkboxes on that page - uncheck the "use wrapper's quartz-wm" one and check the "use system Xquartz" and see if that makes any difference.

- Michael