Mac OS No longer has a serial number and shows "Serial Number (system): Not Available" in system profiler.
STEPS TO PRODUCE THE PROBLEM:
- I had a botched filesystem runnig mac os Catalina 10.5.7, and so i decided to do a clean install, and then do an internet recovery. To be sure my ssd was totally clean including the efi partition, i zero'ed the drive with dd. Then, booted to internet recovery, which oddly booted up to Big Sur recovery even though i never upgraded to Big Sur. I decided to install Big Sur anyway via internet recovery, and after the install, i noticed that in "About this mac" as well as through a terminal command, that my serial number was labeled as "unavailable", and is no longer recognized in the MLB of the "Mail logic board."
- Furthermore, i noticed that my icloud automatically signed my mac out from my icloud interface in the settings panel on my iphone. I never signed myself out before erasing.
EXPERIMENTS AND QUIRKS:
One more strange quirk is that apparantly, this somehow also deactivated all of apples DRM (digital rights management) for any of the apps that i had purchased. I concluded this, because after the clean install from internet recovery, I DID NOT SIGN INTO ICLOUD. Then, instead of importing my files with migration utility, i simply dragged and dropped my digitally purchased app store apps from my time-machine backup, onto my clean install. After removing time machine drive, i opened the apps, and low and behold, all of them worked perfectly without asking me to sign into icloud, or log into the app store. How is this possible?
MY IDEAS PERTAINING TO THE ISSUE:
Supposedly, once a certified apple technician burns a serial number into your logic board, it is impossible to remove unless you have specialized software that contacts apples servers with a registered signature and encryption key, and waits for apples servers to send authorization to write or remove the serial number from the logic board. Assuming that apples technology is impenetrable, then you would have to assume that someone stole apples special software and one of their keys, and used it on my logic board remotely to deserialize my mlb.
The other possibility, is that apples hardware and logic boards are flawed, and they can erase their oen serial numbers. other than that, im out of ideas.
Can someone explain how i lost my serial number, and explain the weird quirks (missing drm, unauthorized deregistering my mac from icloud) that are happening as a consequnce?
Then, can someone please tell me how I can get my serial number burned back into the mlb so that i can use imessage on my mac again?
I found a website with some software called BlankBoard Serialzer at https://www.macintoshrepository.org/26584-blank-board-serializer?ns=1 Could anyone tell me if this sofware is safe to use and if I should use it to re-burn my serial number into my mac?
Thanks for any help! Check screenshots below!