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STLVNUB

Installing Big Sur on Unsupported models

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making a bootable Big Sur info

createinstallmedia=I you want to Install

run app=If you want to ReInstall, need working Wifi

 

BS app runs one my Late  2011 Macbook pro

boots to installer 

All I did was rename SystemVersion.plist

I made it /System/Library/SystemVersion1.plist

now to do same with others

 

While this works for the above going to rest of the way is a no-no

Can't patch S/L/C plist as Installer checks for tampering, well thats what I found 

Edited by STLVNUB
additional info

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