QFileSelector does not work with OS X 10.9

The selector "+osx" is not picked up when using QFileSelector on OS X Mavericks. I have not tried it on a prior version of OS X, so I cannot confirm if this is a Mavericks-specific issue or not. I do, however, know the QFileSelector is working in other cases and that I have set things up correctly, as it is able to pick up the "+ios" selector when running with the iOS simulator.