Use Old Parts with a newer version of macOS ?

[P1LGRIM]

I don't think it is a myth

Clearly you don't have to spoof a Coffee Lake CPU, that's the myth that I was talking about.

This is what I mean by CPU spoofing (not just SMBIOS) :

 

[Simone2345]

Desktop Kaby Lake | OpenCore Install Guide

you will have to spoof a CoffeeLake CPU if you really need to install Sonoma

I followed all the steps in the guide for my processor, it gives me an error and the crossed out Apple logo appears. In the attachment I left the EFI folder with the opencore result... if you can help me, thanks

 

[P1LGRIM]

if you can help me

Your SSDT files were not enabled and there was an error in your config.plist syntax.

 

[Simone2345]

last boot: failed to find ACPI SSDT-PLUG.aml

 

[P1LGRIM]

failed to find ACPI SSDT-PLUG.aml

My bad, try again :

 

[Simone2345]

My bad, try again :

same, doesn't boot.

 

[P1LGRIM]

This is complete nonsense.

Your panic text shows SMBIOS iMac14,2 but the SMBIOS in the config.plist is iMac18,1.

Your panic text shows RealtekRTL8111.kext is loaded but it is not enabled in your config.plist.

 

[Simone2345]

wrong file, sorry

 

[P1LGRIM]

My guess would be that iMac18,1 is wrong for El Capitan.

iMac18,1 was released with macOS 10.12.4 Sierra so probably does not support El Capitan.

Difficult to be sure with so little information provided.
Boot in verbose mode and post a picture of the screen when it stops.

 

[Simone2345]

Why for El Capitan? I'm trying to install Sonoma. is not good iMac 18,2?