title: Bison latest version installed but not in use
body: <pre><code>$ brew install bison
  Warning: bison-3.0.2 already installed
  $ bison -V
  bison (GNU Bison) 2.3
  </code></pre>
  
  <p>How can I change the Bison version in use to 3.0.2? I'm on OS X 10.9.4. I've restarted my terminal after <code>$brew install bison</code>.</p>
  
  <p><strong>UPDATE</strong></p>
  
  <p>I'm really not sure if this is a problem of HomeBrew or Bison. I reinstalled Bison with MacPorts:</p>
  
  <pre><code>$port install bison
  ......
  $bison -V
  bison (GNU Bison) 2.7.12-4996
  </code></pre>
  
  <p>MacPorts did not install the latest version of Bison, but it did change the Bison version in use to the one it installed.</p>
  
  <p><strong>UPDATE ON $PATH</strong></p>
  
  <pre><code>$echo $PATH
  /opt/local/bin:/opt/local/sbin:/usr/local/bin:/Users/my_user_name/.rbenv/shims:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/munki:/usr/local/mysql/bin:/Users/my_user_name/code/bin:/Users/my_user_name/code/bin/git:/Users/my_user_name/code/bin/old_git:/Users/my_user_name/code/bin:/Users/my_user_name/code/bin/git:/Users/my_user_name/code/bin/old_git:/Users/my_user_name/.rvm/bin
  </code></pre>