No avail at installing the retina driver. I don’t ever get the prompt response in the security window
I think there is no retina driver
If you want to enable retina then consider changing it in the screen resolutions setting in your system settings.
This is the prompt for retina display driver or kernel.
I have not seen any additional drivers that needed to be installed after enabling retina on the screenshot you provided. Maybe consider reinstalling Luna? Do you have full administrative privileges on your machine?