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Cannot install high Sierra (Firmware-related error messages)

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Jul 18, 2016
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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
 
Joined
Nov 26, 2010
Messages
16
Motherboard
Gigabyte Aorus X299 Gaming 9
CPU
i9 7900x
Graphics
Gigabyte Aorus 1080 ti WB Waterforce x2
Mac
  1. iMac
  2. MacBook Air
Classic Mac
  1. Power Mac
Mobile Phone
  1. iOS
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.
 
Joined
Nov 1, 2013
Messages
62
Motherboard
Gigabyte GA-Z77X-UD5H
CPU
i7-3770K
Graphics
GTX 970 SSC
Mobile Phone
  1. iOS
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
 
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