I was hoping someone could point me to a tutorial on MDM unlock. Basically, I picked up a Macbook (A1989) from someone which did not have OS installed. The guy said it started software update and but did not finish. Long story short, the touchbar on this device has some kind of a short, so after unplugging it, I was able to install the OS on it, when I found out that it is also MDM locked by his company. I tried changing the serial number on the ROM by only changing a couple of digits of the original serial number. Now after installing the ROM back, the Macbook appears dead = DFU mode. When I connect my wife's Macbook to it, it says some thing "Apple controller" and when I try to restore it or do any operation it simply says "Cannot perform the action" (or something very similar). Can you help me here? The board seems to be developing PPBUS_G3H =12V right now, so it seems to be alive except no boot. Looking for an outline of the S/N number change and DFU update process by anyone with experience.
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Re: T2 Macbook MDM Unlock by S/N change.
i got one similar problem two days ago, got a MDM locked machine in and change s/n, but i changed to a working s/n. so boot up no problem. just having activating problem. so i try few other s/n, no luck, i thing someone in this forum said that they linked to wifi and bluetooth now. so i wright the original s/n back, macbook working fine, but surprised that the MDM is gone.so you can try some other working s/n, and wright the original s/n back and see if this works for you.
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