Hmmm, it's not really important, but that's an entirely different MAC, Miss Nancy, not related to Macintosh at all. Or did you know that? 

MAC (Media Access Control) is a data communication protocol sub-layer. It gives its name to the MAC-Address, the fixed address of every network interface card.

Another MAC is the Migration Authorisation Code, a code that an ISP gives you to move your DSL service to another ISP.

Damned TLAs.

WOT... sorry!

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)