How to simulate a retina display (HiDPI mode) in Mac OS X 10.8 Mountain Lion on a non-retina display?

Question

How can you simulate a retina display (HiDPI mode) in Mac OS X 10.8 Mountain Lion on a non-retina display?

Answer 1

As for me its pretty good app that give you opportunity for changing resolution any that you want.

SwitchResX for Mac and MacBook.

This app resolved all my problems with resolution.