SMAC is Proudly Made In USA. SMAC is a powerful, yet easy to use MAC Address Changer (Spoofer) for Windows , XP, , VISTA and systems, regardless of whether the manufacturers allow this option or not. SMAC can be downloaded from our website for free. Our built-in antivirus checked this download and rated it as virus free. The software is categorized as Internet & Network Tools. This software was originally produced by KLC Consulting, Inc/5(28). Sep 08, · SMAC Professional Edition | Mb. SMAC - a powerful and easy to use program change MAC address in Windows , XP, , VISTA, and , irrespective of whether the manufacturers allow the network card, this choice or not. SMAC is a MUST-HAVE TOOL for IT, Security, Networking professionals, online gamers, and everyone who needs a MAC.