# MacRuby 0.3

**URL:** <https://www.ruby-forum.com/t/macruby-0-3/148099>\
**Category:** Ruby\
**Created:** [September 9, 2008, 9:38am UTC](https://www.ruby-forum.com/t/macruby-0-3/148099 "2008-09-09T09:38:54Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Laurent\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/65b543/32.png) [@Laurent\_S](https://www.ruby-forum.com/u/Laurent_S)\
**Post date:** [September 9, 2008, 9:38am UTC](https://www.ruby-forum.com/t/macruby-0-3/148099/1 "2008-09-09T09:38:54Z")

</div>

Hi,

It is a great pleasure to announce the immediate availability of  
MacRuby 0.3! Check it out while it’s still hot!

MacRuby is 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.

You can learn more about MacRuby, and download a binary installer,  
from the website:

[http://macruby.org](http://macruby.org)

Or about this release more specifically, on our blog:

[http://www.macruby.org/post/macruby-03/](http://www.macruby.org/post/macruby-03/)

This is an important release. MacRuby now comes with a core library  
named 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!

Enjoy,

Laurent

---

<div class="post-metadata">

**Author:** ![Laurent\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/65b543/32.png) [@Laurent\_S](https://www.ruby-forum.com/u/Laurent_S)\
**Post date:** [September 9, 2008, 4:51pm UTC](https://www.ruby-forum.com/t/macruby-0-3/148099/2 "2008-09-09T16:51:11Z")

</div>

Great! Thanks for the release.

After installing 0.3 version, interface builder does not display ruby  
classes and displays error message when try to read ruby class file.  
I had to change first line of rb\_nibtool.rb file to  
#!/usr/local/bin/macruby  
and reinstall to fix it.

Suhku H.

2008/9/9 Laurent S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)

---

<div class="post-metadata">

**Author:** ![Laurent\_S](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/65b543/32.png) [@Laurent\_S](https://www.ruby-forum.com/u/Laurent_S)\
**Post date:** [September 9, 2008, 9:42pm UTC](https://www.ruby-forum.com/t/macruby-0-3/148099/3 "2008-09-09T21:42:15Z")

</div>

Thanks for the report, it was a bug in the installer process. I fixed  
it in all branches (including the 0.3 tag) and re-generated a binary  
installer.

Laurent