Photoshop CS6 and Lightroom 4 will support HiDPI, MacBook Pro Retina Display
 

You know who's likely to buy the MacBook Pro with Retina Display? Creative professionals (obviously). So you know what programs should really be optimized for that 2,880 x 1,800 screen? Try Photoshop, or Lightroom. Adobe hears your frustration, and apparently empathizes mightily: the company just posted a blog post promising Photoshop CS6, Lightroom 4 and Photoshop Touch will support HiDPI, including the MacBook Pro's Retina Display, within the "coming months." (No, this near-term update does not include Photoshop Elements, unfortunately.) While that timetable is on the vague side, the outfit says having a Creative Cloud membership will ensure you get that update sooner. Until then, your frankengadget renders will still look a little blurry, sorry.

http://www.engadget.com/2012/08/30/p...etina-display/