How can I install Ruby on Rails 3 on OSX?

Question

I got a White Macbook and I have to go to a conference in 10 hours but I\'m having a lot of problems.

First, I wanted to have Rails 3, so I used MacPorts to install

Answer 1

You should indeed use rvm, but as no one explained to you how to do this without rvm, here you go:

sudo gem install tzinfo builder memcache-client rack rack-test rack-mount \
  abstract erubis activesupport mime-types mail text-hyphen text-format   \
  thor i18n rake bundler arel railties rails --prerelease --force