Can't detect PDF printing on Mac

QPrintDialog doesn't set the outputFileName of the QPrinter if the user selects "Save as PDF" even though in qprintdialog_mac.mm it appears to record the name.

As a secondary note, it also does not change the outputFormat to PdfFormat. I can see this being debatable but not so much the file name.

Minimal test case:

================= MacPDF.pro ================
QT += core gui printsupport
TARGET = MacPDF
TEMPLATE = app
SOURCES += main.cpp
=============================================

================= main.cpp ==================
#include <QApplication>
#include <QDebug>
#include <QtPrintSupport/QPrinter>
#include <QtPrintSupport/QPrintDialog>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QPrinter printer(QPrinter::HighResolution);
    QPrintDialog dlg(&printer);

    if (dlg.exec() == QDialog::Accepted)
    {
       qDebug() << "File name:" << printer.outputFileName();

       if (printer.outputFormat() == QPrinter::PdfFormat)
          qDebug() << "Format: PDF";

       if (printer.outputFormat() == QPrinter::NativeFormat)
          qDebug() << "Format: Native";
    }
}
=============================================