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 works with a multi-threaded garbage collector, fully supports 64-bit processors, provides DTrace probes, exposes an Objective-C API to control the runtime.
- The HotCocoa library was improved and now provides an API called HotCocoa::Graphics to access CoreGraphics and CoreImage.