How do I fix the “You don't have write permissions into the /usr/bin directory” error when installing Rails?

Question

I\'m trying to install Rails 3 on a brand new MacBook Pro running OS X 10.6.3, Ruby 1.8.7, and Rails 2.3.5 and I\'m wondering if I\'ve hosed myself. So far, I\'ve run these

Answer 1

I'd suggest using RVM it allows you have multiple versions of Ruby/Rails installed with gem profiles and basically keep all your gems contained from one another. You may want to check out a similar post How can I install Ruby on Rails 3 on OSX