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." Then, booted to internet recovery, which oddly booted up to Big Sur recovery even though i never upgraded to Big Sur. To be sure my ssd was totally clean including the efi partition, i zero'ed the drive with dd. 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.Mac OS No longer has a serial number and shows "Serial Number (system): Not Available" in system profiler.
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December 2022
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