title: How to block/unlock USB port in mac os x programatically without reboot
body: <p>Is there any way to block/unblock USB mass storage device in MacOS X  using <code>script</code> or <code>I/O framework</code> without reboot ?</p>
  
  <p>The same can be done in Window easily using system commands, so I wanted to know if this is possible on OS X.</p>