The current X-Europe indeed has some issues when installing..
Getting the alias of the "1200 forests" in the Vegetation_library is something you need to do manually.
Then, a permission is not set correctly on one of the objects.... I need to get to my main Mac to find that one..
Meanwhile, these forums might help you out (if you had not already seen them):
Available downloads please follow ReadMe in every download: X-WORLD Vegetation Library (needed for any X-WORLD package) X-WORLD Africa X-WORLD America X-WORLD Antarctica X-WORLD Asia X-WORLD Australia-Oceania X-WORLD Europe The new X-WORLD for X-Plane 12 continues the successful, high quality and...
forums.x-plane.org