title: Who's creating the files "/private/var/tmp/Untitled-*.uicatalog"?
body: <p>I was investigating why a TeamCity build-agent was running out of disk, and found over 11,000 files in <code>/private/var/tmp</code>, all named along the lines of <code>Untitled-&lt;random-unique&gt;.uicatalog</code>.</p>
  
  <p>Each file is at least 0.6MB.  The total disk footprint is on the order of 4GB.</p>
  
  <p>The files dated back several months, so they survived reboots.</p>
  
  <p>Who is creating them?</p>