title: foreman error while "Getting Started with Node.js on Heroku"
body: <p>I am in the midst of "Getting Started with Node.js on Heroku", where I want to "Run the app locally" by:
  <strong>$ foreman start web</strong>
  (cf. <a href="https://devcenter.heroku.com/articles/getting-started-with-nodejs#run-the-app-locally" rel="nofollow">https://devcenter.heroku.com/articles/getting-started-with-nodejs#run-the-app-locally</a>)</p>
  
  <p>It says:
  /usr/local/foreman/lib/foreman/process.rb:54:in <code>run': undefined method</code>spawn' for Process:Module (NoMethodError)
      from /usr/local/foreman/lib/foreman/process.rb:53:in <code>chdir'
      from /usr/local/foreman/lib/foreman/process.rb:53:in</code>run'
      from /usr/local/foreman/lib/foreman/engine.rb:356:in <code>spawn_processes'
      from /usr/local/foreman/lib/foreman/engine.rb:353:in</code>upto'
      from /usr/local/foreman/lib/foreman/engine.rb:353:in <code>spawn_processes'
      from /usr/local/foreman/lib/foreman/engine.rb:352:in</code>each'
      from /usr/local/foreman/lib/foreman/engine.rb:352:in <code>spawn_processes'
      from /usr/local/foreman/lib/foreman/engine.rb:57:in</code>start'
      from /usr/local/foreman/lib/foreman/cli.rb:41:in <code>start'
      from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/command.rb:27:in</code><strong>send</strong>'
      from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/command.rb:27:in <code>run'
      from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/invocation.rb:126:in</code>invoke_command'
      from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor.rb:359:in <code>dispatch'
      from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/base.rb:440:in</code>start'
      from /usr/bin/foreman:15</p>
  
  <p>(Running on Mac OS 10.7.5)</p>
  
  <p>Any ideas what may help? Thanks!</p>