Marble is currently creating two `.app` files: `marble-qt.app` and `marble.app`. As I posted on [marbled-devel](https://mail.kde.org/pipermail/marble-devel/2013-November/004595.html), I think this is a bug as neither run independently; if I manually move the contents of `marble-qt.app` into `marble.app`, it runs fine. We might consider scripting it in a post-install hook, like [Macports](https://trac.macports.org/browser/trunk/dports/kde/marble/Portfile#L36).