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I'm new to Ruby and Rails and I installed the latest beta version of Rails 4 on my Mac, before I installed RVM to manage my versions. The Rails 4 beta is becoming a huge pain in the ass because it's the default version in every new tab I open in the terminal. How can I uninstall the Rails 4 beta and all references to it?
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Uninstall Ruby on Mac with rbenv For rbenv, use rbenv versions to see which versions you have installed. Use the uninstall command to remove a version. This will remove any gems associated with the version as well. If you want to reinstall Ruby, see Install Ruby on Mac for recommendations of newer version managers.
Except of uninstalling rails you need to uninstall railties gem - rails exec is only wrapper that will select most up-to-date railties gem.
$ gem uninstall rails -v=4.0.0.beta1
$ gem uninstall railties -v=4.0.0.beta1
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