I think you misunderstood my question. I want to use OLD apps - without Retina-enabled functionality - specifically for the advantage of having all of the ui elements at half the size and a very large desktop. These are not apple apps.
Simply I just don't want apple to double the pixels for non retina enabled apps -- optionally of course as most people will want the pixels doubled. I want the buttons and interface tiny as if it were just a regular hi res screen.
Once the are Retina-enabled the whole point is lost and the screen adds no functionality for my uses just aesthetic eye candy which I can do with out.
Is that possible?
I believe so... AirDisplay for the "new iPad" achieves this functionality by allowing you to chose between "2048x1536" or "1024x768 HiDPI" modes from the Display Preferences Panel
Examples
I should note that when not using HiDPI mode its extremely hard to read text without straining my eyes...





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