title: BrowserSync : Command not found after installing browser-sync
body: <p>There was another issue open with the same title which has been closed but my error could not be resolved using the solutions given in that issue.</p>
  
  <ul>
  <li>Mac OSX El Capitan</li>
  <li>Node [v5.6.0]</li>
  <li>Npm [v3.6.0]</li>
  </ul>
  
  <p>I installed Browser-Sync successfully using :
  <code>bash
  $ sudo npm install -g browser-sync
  </code></p>
  
  <p>but when I check the browser-sync version by typing :
  <code>bash
  $ browser-sync --version
  </code></p>
  
  <p>I get this error :
  <code>bash
  -bash: browser-sync: command not found
  </code></p>