Shift and ctrl keyboard modifiers do not work at all in OS X

#include <QtWidgets>

int main(int argc, char **argv)
{
	QApplication app(argc, argv);
	QStringList numbers;
	numbers << "123456" << "123" << "1234" << "123" << "12"
	<< "123" << "1234" << "12345" << "123" << "1234567"
	<< "12" << "12" << "12" << "12" << "12";
	QAbstractItemModel *model = new QStringListModel(numbers);
	QListView *view = new QListView;
	view->setSelectionMode(QAbstractItemView::ExtendedSelection);
	view->setViewMode(QListView::IconMode);
	view->setFlow(QListView::TopToBottom);
	view->setModel(model);
	view->show();
	return app.exec();
}