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Create Unique System & Board Serial Numbers with GenSMBIOS - Video Tutorial

trs96

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Many in this community are starting fresh with a clean install of macOS Big Sur using the OpenCore bootloader. If you have used Clover bootloader previously, remember to Reset NVRAM first before installing Big Sur. This video guide shows you how to get your new install properly working with Apple services.

After you've reached the Big Sur account setup pages, remember to NOT sign in with your Apple ID. Do that after you have created your Serials and SMUUID, added them to your config.plist and then rebooted. Do this at the Apple ID sign in page:

20210103_141135_2_copy.png

Many older Macs have lost support in Big Sur. You may have had to update your 2013 iMac 14,2 (or another SMBIOS) to one that is supported. If you need to generate new Serials this is one of the easiest ways to do that and add them to your new OpenCore config.plist. Here are the four main values you'll create for or enter into your OC config.plist:

PlatformInfo -> Generic -> MLB or Main Logic Board (Motherboard)
PlatformInfo -> Generic -> ROM or Ethernet MAC Address
PlatformInfo -> Generic -> SystemSerialNumber
PlatformInfo -> Generic -> SystemUUID

The System UUID is the best way to Identify a machine, it exists in Windows PCs, Macs and many other platforms. It is 32 characters in length, a Universally Unique IDentifier.

If you'd like to use the EFI agent app (shown in video) to mount your EFI partitions, get it here: https://github.com/headkaze/EFI-Agent/releases


Make sure to watch the whole video to the end. You'll need to check Apple's database of "real" Macs to make sure your generated System Serial Number is unique to your computer.
 
Last edited:
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For some reason, GenSMBIOS comand is generating the same Sl num for me. I tried it two different machines with same Sl num -

F5KS9BZ7F9VM
 
Joined
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Z370 AORUS Gaming 3
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For some reason, GenSMBIOS comand is generating the same Sl num for me. I tried it two different machines with same Sl num -

F5KS9BZ7F9VM
It can generate multiple sets simultaneously.
 
Joined
Jan 1, 2014
Messages
136
Motherboard
HP ProBook 450 G1-Clover
CPU
i3-4000M
Graphics
HD 4600
Mac
  1. iMac
  2. MacBook
  3. MacBook Air
  4. MacBook Pro
Mobile Phone
  1. Android
My bad, It is working fine - user error :roll2:
 
Last edited:
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Intel Nuc6i5SYH
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I5-6260U
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Intel Iris 540
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Getting the following error when GenSMBIOS.command is run:

#######################################################
# Getting MacSerial #
#######################################################

Gathering latest macserial info...
Error checking for updates (network issue)

I don't have a network issue...Any idea what to do?
 

trs96

Moderator
Joined
Jul 31, 2012
Messages
20,294
Motherboard
GA-Z97X-UD3H-BK
CPU
i5-4690K
Graphics
HD4600 / RX 570
Mac
  1. MacBook Pro
  2. Mac mini
Mobile Phone
  1. Android
Joined
Jul 23, 2015
Messages
17
Motherboard
gag41m
CPU
Q8400
Graphics
5750
Mac
Classic Mac
Mobile Phone
Getting the following error when GenSMBIOS.command is run:

#######################################################
# Getting MacSerial #
#######################################################

Gathering latest macserial info...
Error checking for updates (network issue)

I don't have a network issue...Any idea what to do?

Can you tell me how you fixed this ? I am getting the same error.
 
Joined
Jul 23, 2015
Messages
17
Motherboard
gag41m
CPU
Q8400
Graphics
5750
Mac
Classic Mac
Mobile Phone
Getting the following error when GenSMBIOS.command is run:

#######################################################
# Getting MacSerial #
#######################################################

Gathering latest macserial info...
Error checking for updates (network issue)

I don't have a network issue...Any idea what to do?
Its Fine. FIXED
 
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