QPrinter::ScreenResolution causes nothing to be printed when printing to a PDF file on Mac

QPrinter::ScreenResolution causes blank pages to be printed when printing to a PDF file on Mac.

To reproduce modify the textedit example and change the line:

QPrinter printer(QPrinter::HighResolution);

in filePrintPdf() to be:

QPrinter printer(QPrinter::ScreenResolution);