If you installed already builded qt libs then you cannot use binary of libQt4Pas since Qt libs are 64bit and libQt4Pas is 32 bit.
1.With 64bit you must rebuild libQt4Pas, so your qt widgetset will use cocoa widgetset, and there are some qt bugs which should be fixed with qt-4.8.6 and 5.2.2 afaik.That bugs stops me from using Qt 64bit for mac (cocoa).It actually works but have problems with mouse and capture.
2.For using (that's what I'm using now) 32 bit (carbon) you must rebuild qt with carbon (and deploy also) and also you must rebuild libQt4Pas.That works fine - my apps are in real production.