The MAC address is the set of numbers
which uniquely identifies your network card in your machine. This
unique identifier is required in order to license the product to a
machine.
On Windows machines this can be found by typing:
c:> ipconfig /all
and searching for a number in the form of 11-22-33-44-55-66 (it can contain numbers and letters)
On Linux / Unix / Solaris machines this can be found by typing:
% ifconfig -a
and searching for a number in the form of 11:22:33:44:55:66 (it can contain numbers and letters)
IMPORTANT: If you do NOT provide a valid MAC address, the software will NOT run!"