title: How can I tell who code signed an OS X app?
body: <p>On Windows, I can right-click a file and see who code signed it on the "Digital Signatures" tab of the Properties dialog. Is there a similar way to see which publisher signed an OS X app, or details about the certificate used to sign it?</p>
  
  <p>I know I can run <code>codesign -d -r- appname.app</code> to see details about the certificate, and <code>codesign -vvvv appname.app</code> to see whether it passes validation, but neither of those shows me anything about the actual certificate or publisher who signed it, just the one in the bundle identifier for the app.</p>