title: Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources
body: <p>I'm attempting to install <code>jekyll</code> and I've encountered an error. I'm running Mac OS X 10.11.4 (El Capitan).</p>
  
  <pre><code>$gem install jekyll
  ERROR : While executing gem ... (Gem::Exception)
          Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources
  $gem source -l
  https://ruby.taobao.org
  $which openssl
  /usr/local/bin/openssl
  </code></pre>
  
  <p>I welcome your suggestions how to resolve this error.</p>