Mac Rails developers: I installed MacPorts to get RMagick, and it installed a new version of Ruby, without RubyGems. This meant that when I typed script/server, it claimed that:
“Rails requires RubyGems >= . Please install RubyGems and try again: http://rubygems.rubyforge.org”
MacPorts had added some crap to my PATH variable. If you edit your ~/.profile you’ll see this line:
export PATH=/opt/local/bin:/opt/local/sbin:$PATH
Just change that to:
export PATH=$PATH:/opt/local/bin:/opt/local/sbin
Then open a NEW shell prompt, i.e. a new Terminal window (this reloads the PATH variable)…
…and it’ll find your OLD version of Rails before the new MacPorts one, and things will work normally. You can confirm by typing “which ruby” in the terminal, and you should see “/usr/bin/ruby” NOT “/opt/local/bin/ruby”.