Changing "About This Mac" info in EFI

[Roman78]

I would like to change the "About This Mac" information. I found this: https://www.idownloadblog.com/2017/01/13/how-to-modify-about-this-mac-hackintosh/ but thats only on the OS layer itself. Is there a way to modify this in the EFI, so every OS would give this information?

I can read/save the EFI using a CH341A.

 

[yurc]

MacOS system information always purely read from CoreServices directory folder, nothing read from EFI flash chips.

Also, the most low level changing SMBIOS would change system performance such as power management. In hackintosh / OpenCore world, there's a method spoofing an SMBIOS as another Mac to enable set of features. Those changes are handled by bootloader and loaded into memory.

The best ways to do cosmetics are either using technique like aforementioned above, do not using low level spoofing unless you have a real purpose (e.g enabling hardware decoder using MP 7,1 in MP 5,1)

Mine is also stylized, but just cosmetics.

What your goal by changing System Information?

 

[Roman78]

I experiment a lot and swapping a lots of harddisk/SSD. So i would like something on the hardware it self. These are just some of the harddisk's i own....

 

[Roman78]

Software works. At least on Sierra.On newer OS it is a little trickier to edit the picture in it.