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Dell 7370 - M5-6Y57 CPU: can't upgrade from Mojave to Big Sur

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Try this to see if it'll run in Mojave before upgrading to Big Sur

Replace the whole EFI folder in the EFI partition or create and USB boot disk with this EFI folder

(rename the attached folder to EFI)


If you have the Intel Wifi /BT computer, replace Config with Config-IntelWifi


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Looks like it might be a graphics issue. So in the boot arg, add this to get the installation going. Remove it after installation



Here's the edited Config file from your attachment with the boot arg added


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