First let me explain that I've created a million lib directories scouring out all the different responses to this same problem but none of them have really done the trick..
I've tried
sudo mkdir /opt/local/lib/ruby1.9/gems/1.9.1/gems/rails-3.0.0.beta4/lib
sudo mkdir /opt/local/lib/ruby1.9/gems/1.9/gems/rails-3.0.0.beta4/lib
sudo mkdir /usr/lib/ruby/gems/1.8/gems/rails-3.0.0.beta4/lib
sudo mkdir /usr/lib/ruby/gems/1.8/gems/rails-3.0.0.beta3/lib
sudo mkdir /usr/lib/ruby/gems/1.9/gems/rails-3.0.0.beta3/lib
sudo mkdir /usr/lib/ruby/gems/1.9/gems/rails-3.0.0.beta4/lib
My Ruby -v is : ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-darwin10.3.0]
Those most current release of rails --pre is rails-3.0.0.beta4 .
So I'm assuming it 'has' to be rails-3.0.0.beta4/lib that it needs, just not sure where.
I am using .rvm . Running 'which ruby' returns :
/Users/johnsmith/.rvm/rubies/ruby-1.9.1-p378/bin/ruby
Is there a clever way to figure out where exactly that /lib would be on my box?
Thanks everyone!