Simplest way:  

Make you are up to date with rubygems, which is what DHH was referring to with 

gem update --system

Then run:

gem install rails --pre

If you are NOT using RVM, add sudo in front of each of those.

Niels

On Jun 4, 2010, at 6:04 PM, Audrey Lee wrote:

> Hello List,
> 
> Label me a newb, but how do you install Rails 3 on your Mac?
> 
> Google sent me to these URLs:
> 
> http://weblog.rubyonrails.org/2010/2/5/rails-3-0-beta-release/
> http://guides.rails.info/3_0_release_notes.html
> http://asciicasts.com/episodes/200-rails-3-beta-and-rvm
> 
> From early Feb 2010 I see this short recipe:
> 
> gem install tzinfo builder memcache-client rack rack-test rack-mount
> erubis mail text-format thor bundler i18n
> 
> gem install rails --pre
> 
> On April 1 2010 we have this from DHH:
> 
> gem install rails --prerelease after you make sure you’re on Ruby Gems
> 1.3.6 with gem update --system
> 
> 
> But today is June 4 2010 and I'm curious if there is a more current
> way to install Rails 3 on a Mac?
> 
> Also I noticed this on github.com:
> 
> http://github.com/rails/rails/tree/v3.0.0.beta.3
> 
> How do I install that?
> 
> If it were rails 2.x I would just git-clone it into /vendor/ and call it 
> /rails/
> 
> Side note, my Ruby comes from rvm and it currently looks like this:
> 
> $
> $ ruby -v
> ruby 1.9.3dev (2010-06-04 trunk 28157) [i386-darwin9.8.0]
> $
> $
> 
> $
> $ gem list
> 
> *** LOCAL GEMS ***
> 
> rake (0.8.7)
> $
> $
> 
> 
> $
> $ which gem
> /Users/maco/.rvm/rubies/ruby-1.9.2-head/bin/gem
> $
> $
> 
> $
> $ gem -v
> 1.3.7
> $
> $
> 
> Help !?!?
> 
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