title: Finding Android SDK on Mac and adding to PATH
body: <p>I have installed Android Studio on my MacBook Air (OS Version 10.11 El Capitan) and have successfully written a small "hello, world" app and installed on device (Nexus 7) and ran on AVD.  All I want to do now is be able to build the app and install it on device from the command line as opposed to Android Studio.  I'm following the directions here:</p>
  
  <p><a href="http://developer.android.com/training/basics/firstapp/running-app.html" rel="noreferrer">http://developer.android.com/training/basics/firstapp/running-app.html</a></p>
  
  <p>and the relevant line is:</p>
  
  <p>Make sure the Android SDK platform-tools/ directory is included in your PATH environment variable, then execute:</p>
  
  <p>The problem is I can't find the Android SDK on my machine!  I assume it's there because otherwise the program wouldn't compile and run through Android Studio?  Perhaps that's a bad assumption?  I'm new to Macs (I'm used to Windows) so I don't know the best way to search for the Android SDK.  So my questions:</p>
  
  <ol>
  <li>How do I find Android SDK on my machine? Or prove to myself it's not there?</li>
  <li>If it's not there how do I install it?</li>
  <li>How do I change PATH to include Android SDK?</li>
  </ol>