[Interest] Mac with Retina Display - Look is "Pixilated" with Qt-5.4.2

[Robert Iakobashvili]

Gentlemen,
A user pointed to the issue on
Mac Book Pro 15 inch mid 2015. AMD Radeon R9 graphic card,
15.4-inch, 2880 x 1800 screen, Mac OS 10.10.4.
and mentioned that the look is "pixelated as the application
does not support Retina".

Unfortunately, I do not have such expensive HW to
reproduce the issue.

A patch to support 2x and 3x images
from Morten Sorvig has been applied
and images 2x and 3x are inside:

https://codereview.qt-project.org/106717
https://codereview.qt-project.org/106705

Is there something else to be done with Qt-5.4.2
like defining some HIGH-DPI, etc?

Thank you very much!

Regards,
Robert