Hello, I have just received my repaired Macbook Pro, with the Logic board replaced, after paying a hefty bill. I insisted that I wished the serial number in software to match the one on the case, if possible. The repairer, who is an independent, initially said it would not be possible but changed tack later, having found the serializer software. Now the Macbook has arrived and I am pleased that it does indeed have its old serial number. But I have a nagging feeling that there is no proof the logic board was really replaced. So I checked the MAC addresses and...to my surprise... they are all the same! I believe that WiFi is a separate card and that it would therefore not have been replaced and so it must be normal to see the same MAC address. But what about bluetooth and ethernet? My question is: Would the serializer software also change the MAC addresses to go with the serial number? The fault on the original board was intermittent so it could be days before it recurred if the board was the same. I would tend to trust the repairer having dealt with them in the past, but... it's awkward that there is no proof.