The test applications currently are not recognized by the window manager. For the test apps to receive events they require an 'app wrapper'.
It was described in this manner on the vtk list,
An app wrapper is is a collection of directories, top level ends in .app. Subdirectory
Contents contains an Info.plist file and a MacOS directory. The MacOS
directory contains the binary executable.
The easiest way to get this going is to get an example application from
Apples' sample software, download it, copy the .app directory, and replace
its binary with your Mace binary for example. Then, when you execute the
Mace binary, the app will launch, appear in the dock, and the window
manager will properly send it events.
Work is being done on the vtk build process to include this.