AppleIGC kext won't load

[mike-code]

Hi. I have an ASUS and not Gigabyte motherboard, although after upgrading from macOS 11 to macOS 13, I have the same issue with I225-V controller.

Thing is, I don't have the same values for vendor/subsystem ID as you (ie. they seem sane), see below

lspci

ringo@archbox /mnt/efi % sudo lspci -nnvv | grep 225
0a:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller I225-V [8086:15f3] (rev 02)
	Subsystem: ASUSTeK Computer Inc. Ethernet Controller I225-V [1043:87d2]

stock EEPROM dump

7C3C 7F3F E883 0D20 FFFF 1045 FFFF FFFF.
FAFA 0125 602F 87D2 1043 15F3 8086 8200.
8022 0905 47F0 0001 E4A4 0040 2400 FFFF.
3F7D 3000 5A0A 0C00 0508 0000 8203 8427.

I've tried the AppleIGC.kext solution, but for some reason I don't see this kext loaded in kextcache. I wondered if perhaps the reason I can't load this kext is because of some system ID mismatch, but I can see that the Info.plist of this kext has 0x15f38086 which should match my network card. Naturally I have it enabled in Kernel>Add