MAC is a hardware encoded and it can't be changed from there. but whenever we connect to wireless network it asks our system for our MAC address and our system reads it from our hardware, here we can fool system. This is called MAC spoofing.
so whenever any device asks our system for our MAC address, instead of reading it from hardware, we can send our different MAC of our choice.
For LINUX :-
You can use MACCHANGER
For Windows :-
Technitium Mac address Changer
LIKE, SHARE & SUBSCRIBE