WiFi not connecting, Audio lost after SIP, Ethernet not working with VT-D

[nothing521314]

System Configuration:

• Mainboard: TUF Gaming B660M Plus D4

• CPU: Intel Core i5-13500

• WiFi: BCM943602CS

• OS: Tahoe 26.0

Issue(s):

1. WiFi issue

• Followed instructions in GettingStarted.md.

• WiFi networks are visible, but cannot connect even with the correct password.

• Checked logs with sudo dmesg | grep bcmc, no output.

2. Audio issue

• After enabling SIP, system audio stopped working.

• Temporary fix: installed AppleHDA.kext using Mykextinstaller, which restored audio.

• Ethernet issue

• After enabling VT-D and disabling DisableIOMapper, Ethernet stopped working.

Expected Behavior:

• WiFi should connect successfully with the correct password.

• Audio should still work after enabling SIP.

• Ethernet should work with VT-D enabled and DisableIOMapper disabled.

Actual Behavior:

• WiFi cannot connect.

• Audio is lost when SIP is enabled and AMFIPass.kext is removed.

• Ethernet is not functional with VT-D enabled.

Additional Context:

Please let me know if logs, debug files, or additional testing is required.

[vbored]

When you set DisableIoMapper to true in the Kernel --> Quirks section of your Config.plist file you are actually disabling
AppleVTD without which the NEW WiFi firmware cannot be loaded and hence activation of WiFi fails.
Setting DisableIoMapper to false in your Config.plist file will enable AppleVTD, provided VTD is also enabled in Bios, being the condition that is required for the NEW WiFi firmware to properly load from its /usr/local/share/firmware/wifi/ repository, and thus enabling WiFi functionality, as required.
Audio being lost by enabling SIP...is because mykextinstaller require csr-active config of 03080000 for it to function properly so enabling SIP disables the audio.

[0xFireWolf]

Thanks for your interest in this project and for joining the beta testing.

Wi-Fi Issue

Please identify the encryption method used by your Wi-Fi network. Is it WPA2-PSK? Note that if your Wi-Fi network uses purely WPA3-SAE, the chip won't be able to connect to it because it does not support WPA3 at all. In this case, you might want to switch to WPA2/WPA3 mixed.

Audio Issue

Since installing AppleHDA.kext to /S/L/E requires disabling the SIP, you need to change the csr-active-config to a value that is compatible with AppleHDA.kext. Note that BCMC works regardless of whether you disable SIP or not.

Ethernet Issue

Please identify your Ethernet card.

If it is an Intel one and is natively supported by Apple's DriverKit (DEXT) driver, please consider using the native Apple driver and checking whether your Ethernet card works.

If it is a Realtek one and you are using Mieze's RTL8111/8125 driver, please note that Mieze's drivers are not compatible with AppleVTD under macOS Tahoe at the moment.

If you rely on Ethernet connections, I highly suggest you 1) stay at macOS Sequoia where the Realtek Ethernet driver is compatible with AppleVTD and OCLP is available (you need to downgrade the network stack for Wi-Fi) or 2) disable BCMC and IOMMUs until 2.1) Mieze finds a solution to mapping Tx packet buffers properly or 2.2) I have cycles for finding a solution that removes the dependency on AppleVTD from the Wi-Fi driver.

Please note that BCMC is still a prototype and thus is not intended for daily use in production systems.

I am interested in the Wi-Fi connectivity issue and feel free to ask follow-up questions.