Sizes is a great app that helps you in resizing images for Retina display.
Just drop your files on the icon and... wait a second!
You don't need to name your files properly - Sizes does it for you. And of course you can change the image suffix. Really simple.
Changes in user interface.
Corrected error that crashes application at first start in OS X 10.9
Sizes (com.apptorium.sizes) is a Mac software application that has been discovered and submitted by users of Software.com.
The latest version that our users have reported running on their systems is Sizes 1169.