New Assets Generator Plus for OS X lets you create icon asset catalogs

Accesources Pty has introduced Assets Generator Plus 1.0, an icon generation tool developed exclusively for the Mac. It allows developers to create icon asset catalogs for iOS, OS X or Android apps.

Simply drag and drop your icon into to Assets Generator Plus and click create asset catalog to get the job done in seconds. It provides automatic image naming. 

Assets Generator Plus 1.0 is available for $1.99 at the Mac App Store. It requires Mac OS X 10.9 or higher.