Processor Unknown and Serial Number Default String?

[vanquish]

I have just recently managed to install BigSur and for the most part, everything is working fine. However, I noticed that whereas in Catalina my system showed as a MacPro 2017 and Core i5, it now shows processor unknown and serial number as "default string". Has anyone else come across this issue?

 

[AudioGod]

I have just recently managed to install BigSur and for the most part, everything is working fine. However, I noticed that whereas in Catalina my system showed as a MacPro 2017 and Core i5, it now shows processor unknown and serial number as "default string". Has anyone else come across this

Go into your config.plist and change the ProcessorType from 0 to 1537, save and restart and fixed.
Then add RestrictEvents to your Kexts folder and config and your CPU info will then show correctly under about your Mac instead of it listing as a intel.

As for your mac listing wrong, are you sure your SMBios details are correct in your Plist?
Thats the only reason that would happen.