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RubyCocoa is a framework for Mac OS X that allows Cocoa programming in the object-oriented scripting language Ruby. RubyCocoa lets you write a Cocoa application in Ruby. It allows you to create and use a Cocoa object in a Ruby script. It's possible to write a Cocoa application that mixes Ruby and Objective-C code.

What's New

Version 1.0:
  • bug fixes
    • imcompatible NSString#split
    • cannot handle KVC/KVO autonotify
    • KVO willChangeValueForKey/didChangeValueForKey was invoked twice
    • NSBundle.bundleForClass: crashes on ruby uninitialized thread
    • libffi: ffi_call( return value buffer too small)
    • GraphicsContext.graphicsContextWithGraphicsPort_flipped crashes
    • DLOG macro: format more...


  • Mac OS X 10.4.8 or later
  • Xcode SDK

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Alamak Member IconComment+123

RubyCocoa had been a good idea at the beginning, but now, the MacRuby project is much more promising: 1. it's not an "expensive" bridge between original Ruby and Cocoa but a re-implementation of Ruby 1.9 on top of the Objective-C 2 runtime; 2. MacRuby objects are native Objective-C objects in disguise, no proxies; 3. the HotCocoa layers provides a much less verbose, much more Ruby-like syntax for Cocoa objects and methods.

Of course, MacRuby is now Intel only while RubyCocoa is still usable with PowerPC Macs. But the PPC days are numbered now. MacRuby is the future!

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Current Version (1.x)


Downloads 6,573
Version Downloads 2,044
License Free
Date 24 Jul 2009
Platform OS X / PPC 32 / Intel 32
Price Free