Assimp is not shipped with Qt 5.12.2 on OSX

I installed the most recent version of Qt5 - 5.12.2 for macOS and tried to create an application with `SceneLoader` object for loading my scenes. It does not work no matter what format I pass to it, I always have this error:

> Found no suitable importer plugin for <any format here>

I also can't find any examples in my `/Users/user/Qt/Examples/Qt-5.12.2/qt3d` (it is where I have Qt installed) regarding *assimp* but according to the [documentation](https://doc.qt.io/qt-5/qt3d-attribution-assimp.html) it must be there.

It also worth mentioning, that even though `SceneLoader` does not open anything (and `*.obj` as well), I am able to open them using `Mesh` object and then render them myself.

What have I done wrong? Do I need to install anything else in order to make it work? I tried to find in the components anything related to 3d or assimp and everything was ticked there, however, I was not able to find examples.

The code from here simply does not compile.

This is the log I have:

Qt3D.Renderer.SceneLoaders: Qt3DCore::QEntity *Qt3DRender::Render::LoadSceneJob::tryLoadScene(Qt3DRender::Render::Scene *, QSceneLoader::Status &, const QStringList &, const std::function<void (QSceneImporter *)> &) Found no suitable importer plugin for QUrl("file:///Users/user/Downloads/Mask.3ds")