title: Cron not works on mac osx and can not save
body: <p>I use Rails 4 + whenever 0.9.2 on Mac os</p>
  
  <p>But it didn't work at all. it seems never run the script</p>
  
  <p>Whenever config file</p>
  
  <pre><code>every 1.minute do
    command "/Users/get_price_and_send_mail.rb"
  end
  </code></pre>
  
  <p>Crontab</p>
  
  <pre><code>* * * * * /bin/bash -l -c '/Users/get_price_and_send_mail.rb'
  </code></pre>
  
  <p>And If I edit the crontab manually, <code>crontab -e</code>
  and save it with <code>wq!</code></p>
  
  <h2>"crontab.f3SIocnMWc" 5L, 349C written</h2>
  
  <p>Then <code>crontab -l</code> gave me the original result, it didn't changed.</p>