About MacRuby
A version of Ruby 1.9, ported to run directly on top of Mac OS X core technologies such as the Objective-C common runtime and garbage collector, and the CoreFoundation framework. While still a work in progress, it is the goal of MacRuby to enable the creation of full-fledged Mac OS X applications which do not sacrifice performance in order to enjoy the benefits of using Ruby.

What’s New in this Version
- This is an important release. MacRuby now comes with a core librarynamed HotCocoa, which simplifies Cocoa programming by using simple Ruby idioms.
- The dispatcher was rewritten to use the Objective-C runtime, which eliminates many ambiguities but also improves some performance.
- And finally, lots of bug fixes, and a better Cocoa and Ruby support.