AppleIGC on macOS Tahoe doesn't work

[Blu-Dread]

i have a TX hang failer
Mobo ROG Asus MAXIMUS XIII Hero
CPU i9 10900K 32GB DRAM
GPU AMD RX 6900 XT

[ 327.209408]: igc: Detected Tx Unit Hang
Tx Queue <0>
TDH <0>
TDT <21>
next_to_use <21>
next_to_clean <0>
buffer_info[next_to_clean]
time_stamp <2e09>
next_to_watch <>
jiffies <7fd0>
desc.status <0>

2025-07-02 23:02:03.555346+0200 localhost kernel[0]: tcp listen: [:88<->:0] interface: (skipped: 0)
so_gencnt: 257 t_state: LISTEN process: kdc:155 so_qlimit: 0 error: 0 so_error: 0 svc/tc: 0
2025-07-02 23:02:03.555407+0200 localhost kernel[0]: tcp listen: [:88<->:0] interface: (skipped: 0)
so_gencnt: 259 t_state: LISTEN process: kdc:155 so_qlimit: 0 error: 0 so_error: 0 svc/tc: 0
2025-07-02 23:02:04.064975+0200 localhost kernel[0]: tcp listen: [:49152<->:0] interface: (skipped: 0)
so_gencnt: 384 t_state: LISTEN process: 360Daemon:350 so_qlimit: 0 error: 0 so_error: 0 svc/tc: 0
2025-07-02 23:02:04.065012+0200 localhost kernel[0]: tcp listen: [:49152<->:0] interface: (skipped: 0)
so_gencnt: 385 t_state: LISTEN process: 360Daemon:350 so_qlimit: 0 error: 0 so_error: 0 svc/tc: 0

[Sayor0630]

Same problem

[MacAbe48]

Maybe that can help the developer solve it, if possible.

If you disable AppleVTD, then it works under Tahoe, and you can do that either in the BIOS or by using DisableIOMapper in OpenCore. But if you disable AppleVTD, Thunderbolt stops working — so anyone who has Thunderbolt on their motherboard should be aware of that.

[Blu-Dread]

thanks for the suggestion i will try it later today . I tried it and it works but I don't know about the thunderbolt issue because I don't use it.

[jzrodriguez98]

Maybe that can help the developer solve it, if possible.

If you disable AppleVTD, then it works under Tahoe, and you can do that either in the BIOS or by using DisableIOMapper in OpenCore. But if you disable AppleVTD, Thunderbolt stops working — so anyone who has Thunderbolt on their motherboard should be aware of that.

@MacAbe48 Is this situation around Thunderbolt and AppleVTD applicable to any motherboard brand? Currently I don't have this problem in a MSI z590 mobo and a MSI TB4 add-in pci-e card.

[MacAbe48]

@jzrodriguez98 As far as I know, yes.
To what extent don't you have this problem? So, do you mean Thunderbolt works for you even though AppleVTD is disabled?
You can check in ioReg. whether AppleVTD is present or not!

[jzrodriguez98]

@MacAbe48 I disable Apple VTD in the config.plist file as it's necessary to have my I-225v Ethernet card fully working.

[CChenxiiiii]

It always doesn't work whenever you enable or disable AppleVTD.

[Sayor0630]

It always doesn't work whenever you enable or disable AppleVTD.

Same. It doesn't work at all