I've just installed Qt and QtCreator on my Mavericks and I'm unable to open my qmake project (the .pro file).

In the "New project" dialog I'm also unable to create Qt project:
dNz7V.jpg

The environment was detected correctly (xcode clang):


I remember having the same problem when I tried QtCreator under Windows XP and I was told that it was too old system and is not officially supported, so I switched to Windows 7 and that was the solution.

Here I'm running pretty recent MacOS X, so what can it be? Is it "too recent"?