FIX How to fix Unknown CPU Error in About This Mac (Clover)

Cyberdevs

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Staff member
Joined
Aug 29, 2018
Messages
78
Motherboard
GA-Z170X-Gaming 5
CPU
Intel Core i7 6700K
Graphics
AMD Radeon Pro 580
OS X/macOS
10.15.x
Bootloader
  1. Clover (UEFI)
  2. OpenCore
Mobile Phone
  1. iOS
If you get the Unknown CPU in About This Mac you can use the following settings according to your processor.

Use IORegistry Explorer or IOJones to check the current "cpu-type" value for your processors. You can find the value by clicking the CPU0@0 like shown in the picture below:
01.png


I have an Intel Core i7 6700K so the value is 0507.



For Core i3 Series you can set the CPU type to:
0x0309 = Core i3
02.png

For Core i5 series you can set the CPU type to:

0x0407
0x0601 or 0x0605 (to be more accurate) = Intel Core i5
03.png


For Core i7 Series you can set the CPU type to:

0x0701 or 0x0705 (to be more accurate) = Intel Core i7
You can also try 0x0507 if the values above didn't work.
05.png

For Xeon Series you can set the CPU type to:
0x0505 Dual-Core Intel Xeon
0x0510 Quad-Core Intel Xeon
0x05A5 Quad-Core Intel Xeon
Intel 5960X 8-Core Intel Xeon E5 0x0a01 (Thanks to nmano)
 

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EliteMacx86

Administrator
Staff member
Joined
Jul 22, 2018
Messages
3,419
Motherboard
Supermicro X11SPA-T
CPU
Intel Xeon W-3275 28 Core
Graphics
2xAMD RX 580 8GB
OS X/macOS
11.0.x
Bootloader
  1. OpenCore
Mac
  1. Mac mini
  2. MacBook Pro
Mobile Phone
  1. Android
  2. iOS
If you get the Unknown CPU in About This Mac you can use the following settings according to your processor.

Use IORegistry Explorer or IOJones to check the current "cpu-type" value for your processors. You can find the value by clicking the CPU0@0 like shown in the picture below:


I have an Intel Core i7 6700K so the value is 0507.



For Core i3 Series you can set the CPU type to:
0x0309 = Core i3
View attachment 310
For Core i5 series you can set the CPU type to:

0x0407
0x0601 or 0x0605 (to be more accurate) = Intel Core i5
View attachment 313

For Core i7 Series you can set the CPU type to:

0x0701 or 0x0705 (to be more accurate) = Intel Core i7
You can also try 0x0507 if the values above didn't work.

For Xeon Series you can set the CPU type to:
0x0505 Dual-Core Intel Xeon
0x0510 Quad-Core Intel Xeon
0x05A5 Quad-Core Intel Xeon
Intel 5960X 8-Core Intel Xeon E5 0x0a01 (Thanks to nmano)
Better than editing the AppleSystemInfo.strings
 
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Cyberdevs

Supervisor
Staff member
Joined
Aug 29, 2018
Messages
78
Motherboard
GA-Z170X-Gaming 5
CPU
Intel Core i7 6700K
Graphics
AMD Radeon Pro 580
OS X/macOS
10.15.x
Bootloader
  1. Clover (UEFI)
  2. OpenCore
Mobile Phone
  1. iOS
Yes this method is much easier.
 
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