Adobe has updated Photoshop CS6 and Illustrator CS6 with full Retina support, among many new features.
From Adobe :
This update installs new features for Adobe Creative Cloud members and Photoshop subscribers. It offers exciting new capabilities for design, photography and more, including the freedom to nondestructively edit with Blur Gallery and Liquify using new Smart Object support, the ability to export text and shapes as CSS, the option to create Conditional Actions, and support for new HiDPI displays that enable a dramatic improvement in image fidelity and resolution. Other new workflow timesavers are also included. Customers with Photoshop Extended will also receive new 3D options including improved live previews that simplify the creation of shadows and reflections in 3D artwork and a 32-bit color picker for better illumination control, and more.
Note however, these changes are unavailable to those who’ve bought traditional versions of Photoshop CS6, and Adobe has not said when, or even if, ‘perpetual users’ of CS6 will have access to these features. Retina Display support for Mac is available for all users.
To get the update In Photoshop or Illustrator, choose Help > Updates. The Adobe Application Manager will launch. Select Adobe Photoshop or Adobe Illustrator CS6 and choose “Update.”.