title: Debugging hanging app on OSX
body: <p>This question involves Unity3d, but it's not specifically about it.</p>
  
  <p>I'm building a Unity project for OSX; as a result, I get complete .app that I can run — without xcode project in between, as on iOS. Everything goes OK, but my app hangs up from time to time, forcing me to kill it.</p>
  
  <p>What OS X tools can I use to help with debugging such a situation? May be there's something in xcode instruments that can help me?</p>