I was just playing around with something like this (changing the MAC address of my wireless router)
I'm not sure what ISP you are using, the ISP I use assigns a specific IP to each device that I connect to the cable modem. After I changed the MAC address of my wireless router to 00:e2:e3:e4:e5:e6 I had to reset the cable modem in order to get a new IP address assigned to the new MAC address of the wireless router.
After rebooting the modem a new IP address was assigned and I was able to connect to my wireless network and access the internet. I verified that my IP address was different than it was before the MAC address change.
I went back to my wireless router settings and returned the MAC address to it's default and reset the modem again. My IP address changed back to the original one I had before I started playing with any of this.
tl;dr: After you've changed your MAC address, try restarting your modem and that should give you a new IP address and allow you to access your network and internet.
Your not changing the MAC address, just spoofing it which is entirely different. Like was said before, the MAC address can't be changed. You are just changing what the device presents to the outside, and not actually changing the MAC.
Your not changing the MAC address, just spoofing it which is entirely different. Like was said before, the MAC address can't be changed. You are just changing what the device presents to the outside, and not actually changing the MAC.
Edit: when I say "changed" I'm referring to the change I made in the settings of my router. I'm aware that routers (and other network interfaces) have a MAC address that is "unchangeable". His/Her goal was to spoof the MAC address, he/she was not using the correct terminology but the desired result can be achieved through the processes above.
Yes it is semantics, but when people who are trying to learn read these things, they take them at face value. They then believe that it is possible because someone else reports it as being able to be accomplished. I just wanted the correct information out there. Sorry if it offended you as I can only see what you wrote and not know what you actually meant.