I have tried out the Steam version of UT 3. The necessary additional libraries (Direct X 9.x, VC Redist and .NET 2+) are installed, the game starts, I can fiddle around in the menus, but as soon as I want to start a match, the game freezes. The map loading screen appears, the logo spins a few times and then stops. And that's it. Nothing more happens.
Has anyone an idea?
(Retina Macbook Pro 2012, OS X 10.9.1, CrossOver 13.0.1.)