title: multiple ruby version on my macOS will auto switch version
body: <p>pre: in my mac, I install rvm and rbenv both set a separate version.</p>
  
  <p>and I look up "brew info ruby" is another version. in the terminal I use "ruby -v" is 2.3.7 is another version that I never set. </p>
  
  <p>last time i use rvm to set default and current version to 2.5.3 it useful. then current that's wasn't work. how I to correct this issue...</p>
  
  <ul>
  <li>brew info ruby => 2.6.3 </li>
  <li>rvm default and current 2.5.3</li>
  <li>rbenv global and local 2.5.3</li>
  <li>in terminal $ ruby -v 2.3.7 that's never set</li>
  </ul>