title: MAC - I can't open Android Device Monitor on Mac
body: <p>I have opened it as an administrator and I don't want to install anything unnecessary.
  When I tried to open Android Device Monitor through Android Studio: Tools > Android > Android Device Monitor. It always shows the following screen shot:
  <a href="http://i.stack.imgur.com/PdH5y.png" rel="noreferrer">Screen shot that shows "An error has occurred"</a>
  I have found solutions for windows, but I did not find solutions for mac.</p>
  
  <p>One piece from the log:</p>
  
  <pre><code>!ENTRY org.eclipse.osgi 4 0 2015-12-02 22:52:40.714
  !MESSAGE Bundle reference:file:org.apache.lucene.core_2.9.1.v201101211721.jar@4 not found.
  </code></pre>
  
  <p>There are lots of similar lines like this showing "something not found".</p>
  
  <p>So what is missing? How do I install the exact missing parts? Thanks! (There is no enough space for me to install everything from android studio.)</p>