with that type of box you would not be using the MAC from the box.
You would generate your own MAC with a prefix of 00:1A:78 http://iptvtalk.net/showthread.php?15280-MAC-generater
And then you would use that along with another application like Stalker thru Kodi... or Potato Tv is a good one and I do not think you even need a MAC attached when using Potato TV method. http://iptvtalk.net/forumdisplay.php?152-Potato-TV
or STBemu is another method (which would use a generated MAC as well)