Despite how it sounds, the MAC address has nothing to do with Apple, Macs, or Macintoshes.

A MAC address is just a series of numbers and letters that identifies your Network Interface Card (NIC), which you are probably using to connect to the Internet.There are several programs out there that let you change your MAC address, but most aren’t free.

SimpleMAC is one of those few freeware programs that lets you quickly change your MAC address. Once you start it, you should see something like this:

Select your network card. The series of numbers and letters in the lower left identify your MAC address. You can replace these with a sequence like 00DEADBEEF01. Enter it in two at a time.

Click Set! to change your MAC address. If you want to restore your original address, click Reset.

Download simplemac, more info here.