Ruby on Rails: Mac OS X 10.6 installation fail. Please help

I have just completed the tryruby.org tutorial, followed by the rubyforzombies.org tutorials and all was well. Then I moved onto installing Ruby 1.9.2 and Rails 3.0.4 using my Mac Os X 10.6 terminal, so far so good.

I have created a rails app via the command line as follows:

$ rails new ~/Sites/_ruby/rail3sqlite

$ cd rails3sqlite

$ rails server

The folder and file structure is being generated successfully but when I run the last line rails server I simply get an error saying:

Could not find gem 'sqlite3 (>= 0, runtime)' in any of the gem sources 
listed in your Gemfile.

How can I get this working?

It seems to me the setup of this is harder than learning the language at this point.

Either way it would be awesome if someone could help me with this setup issue.

So far I have only been using MAMP to run PHP locally (which sets up everything automagically for me) so I am used to using MySQL as opposed to SQLite.

Is there a reason to choose one over the other?

Are there GUI tools for SQlite such as PhpMyAdmin for MySQL?

How can I get rails working with MySQL? (I tried adding the -d mysql option into the rails new command but then I get the same error as above with mysql2 as opposed to sqlite3.

Thanks, Jannis

Update:

So I followed the advice below and ran $ bundle install within my ruby3sqlite directory and this was returned in the console:

Jannis:rail3sqlite Jannis$ bundle install
Fetching source index for http://rubygems.org/
/Users/Jannis/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/remote_fetcher.rb:184:in `rescue in fetch_path': SocketError: getaddrinfo: nodename nor servname provided, or not known (http://rubygems.org/quick/Marshal.4.8/sqlite3-1.3.3.gemspec.rz) (Gem::RemoteFetcher::FetchError)

Followed by all of these lines:

    from /Users/Jannis/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/remote_fetcher.rb:176:in `fetch_path'
    from /Users/Jannis/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/spec_fetcher.rb:111:in `fetch_spec'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/remote_specification.rb:47:in `_remote_specification'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/remote_specification.rb:53:in `method_missing'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:101:in `block in __dependencies'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:98:in `each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:98:in `__dependencies'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:68:in `activate_platform'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:325:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-开发者_如何学编程1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:215:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:344:in `block in resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:343:in `resolve_requirement'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:295:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `reverse_each'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:294:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:160:in `start'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:128:in `block in resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:127:in `catch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/resolver.rb:127:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/definition.rb:151:in `resolve'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/definition.rb:90:in `specs'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/definition.rb:85:in `resolve_remotely!'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/installer.rb:35:in `run'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/installer.rb:8:in `install'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/cli.rb:226:in `install'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/vendor/thor/task.rb:22:in `run'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/vendor/thor.rb:246:in `dispatch'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/lib/bundler/vendor/thor/base.rb:389:in `start'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/bundler-1.0.10/bin/bundle:13:in `<top (required)>'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/bin/bundle:19:in `load'
    from /Users/Jannis/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/bin/bundle:19:in `<main>'
Jannis:rail3sqlite Jannis$ rails server
Could not find gem 'sqlite3 (>= 0, runtime)' in any of the gem sources listed in your Gemfile.

If you have any ideas what those lines mean and what I need to do I would really appreciate your help.

Thanks for the suggestions so far! Much appreciated.

Update 2:

So it seems the above was just temporary, maybe the gems server was down or my ISP was having an issue? Who knows… either way I re ran the bundle install command and everything is now working as it should.

Thanks.

In Rails 3, the gems that your project depends on are listed in Gemfile in the root of your project directory. You need to run bundle install to (1) ensure that your applications dependencies are installed, and (2) generate the Gemfile.lock that determines exactly which versions of these gems your application should use. (Note that the one command does both of those things for you.)

Once you've run bundle install, you should be able to start your development server using rails server.

[Edit]

You can learn more about Bundler, the system that manages your Gemfile, at the Bundler homepage.

Make sure to cd rails3sqlite3 and then bundle install.

I put together a procedure for Rails 3/Ruby 1.9.2/RVM on Snow Leopard 10.6... and threw it up on a site. Have a look, it might help with some of your issues.

http://railsonosx.com

For a fresh rails4 (ruby 2) setup on Mac, checkout this blog post:

http://blog.parsalabs.com/blog/2013/08/27/setting-up-a-ruby-on-rails-4-development-environment-on-a-clean-mac-os-x-installation/

I have tried and tested this method on my own mac. thought I'd share it with the community. hope you will find it useful.