I'm on Gnome 3, and it seems like I'm able to add cloned mac address to my network interfaces from the GUI wizard of Network Manager. But the catch is, every time I reboot my computer the cloned mac address of specific devices that I had set earlier are no longer there. Therefore I have to resort to re-entering those details manually again and again, every time I reboot my computer.
How do I get over this issue? Thanks.