title: Is it possible keep an NSTask running even after app terminates?
body: <p>I am using <code>NSTask</code> to download/upload files to a server. When I quit the app, the download/upload also stops. Is there any way to keep these tasks running after the app quits?</p>
  
  <p>In general, I want to implement the feature like Safari downloads, which continue after Safari terminates.</p>