5.3.0 Alpha, 5.3.0 Beta1
OS X 10.9
Qt Creator 3.0.82 (opensource)
Qt 5.3 beta (qt-opensource-mac-x64-clang-5.3.0-beta.dmg)
In Qt 5.2 I had no problem with this.
I was using the source code on Windows (inside a VM) with Qt 5.2, then I started to use the same code on OS X (main OS) with 5.2 and everything was ok.
When I installed Qt 5.3 Alpha I had this issue:
QQmlApplicationEngine failed to load component
qrc:///qml/main.qml:1 Expected token `numeric literal'
qrc:///qml/main.qml:1 Expected a qualified name id
The same happened using Qt 5.3 Beta.
To test it you can create a default Qt Quick Application and then change the main.qml to have 'byte order mark'.