IconComposer2x
Icon Composer 2x is a replacement for Apple's Icon Composer that supports Retina Resolution Icons.
Icon Composer 2x
Icon Composer 2x is a replacement for Apple's Icon Composer that supports Retina Resolution Icons. On GitHub: https://github.com/lemonmojo/IconComposer2x
High Resolution Guidelines for OS X: Optimizing for High Resolution
Create a Set of Icons That Includes High-Resolution Versions