gem install rails –include-dependencies -v 1.2.6
gem uninstall rails
Select gem to uninstall:
1. rails-1.2.2
2. rails-1.2.6
3. rails-2.0.2
4. All versions
> 3
Successfully uninstalled rails version 2.0.2
Oh yeah – this is cool http://rubyosx.rubyforge.org/