@MysticalOS I ended up getting mine to work by changing my serial via Chameleon Wizard. I was stuck at the part where it said I needed to call Apple Customer Support and provided me with a code. Called, gave them my code AND my real MacBook Serial number...bingo. It is now working.
Fresh install of 10.9.5. Applied FileNVRam. I have a real Mac mlb and rom. I have been trying to determine how to correctly inject these values. Do all I need to worry about is: sudo nvram 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:MLB=XXXX sudo nvram 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:ROM=XXXX I am not positive what format I should use for the values XXXX. When I go to iMessage_debug, should the values then match what I injected? If easier, please PM me. Would really like to get this resolved!