Cannot install high Sierra (Firmware-related error messages)

[claustin]

I am facing the same problem while updating Sierra to High Sierra, tried every method/ Its not working. same firmware update error. Need a solution

The only thing that got me past this was removing my graphics card and booting from integrated graphics.

 

[rhodestephane]

Wait how do we get to the SMBIOS option?

 

[zeuscba]

View attachment 287775

Open it in Clover Configurator and select another system definition, then choose iMac14,2 again and all of the information will be updated :

View attachment 287776

The Serial Number and SmUUID that I have change when do this, is posible keep the originals serial and SmUUID or doing this can reproduce an error?

Note : I do the steps of SMBIOS Generation with Clover on a Backup Clone to try, keeping the originals Serial and SmUUID and then I can't boot, freezing on logo

 

[waikariboy]

Any updates to this. Doing a fresh build with unibeast 8.3.2.