title: How do I install Ruby without using RVM on OS X?
body: <p>I have some issues with upgrading my Ruby version with RVM on OS X. </p>
  
  <p>RMV uses MacPorts, causing me to run <code>sudo port selfupdate</code>, which gets a bunch of compiling errors, despite correct Xcode command line tools installed.</p>
  
  <p>I found some installation instructions using Linux <code>apt-get</code> but unfortunately I don't have in it on my Mac.</p>
  
  <p>I want to install Ruby without RVM. How can I do that? </p>