Fix IntelMausi Ethernet Connection After macOS Tahoe Update

How to Fix IntelMausi Ethernet Not Loading on macOS Tahoe Update

If your Intel H610 motherboard's Ethernet connection (typically Intel I219-V) has stopped working after updating to macOS Tahoe, it is usually caused by network driver binding issues or changed ACPI mappings in the update.

1. Update the Kext to the Latest Version

Older versions of IntelMausi.kext fail to load on macOS Sequoia/Tahoe due to strict driver verification.

1. Download the latest release of IntelMausi.kext (version 1.0.8 or newer).
2. Replace the kext in your EFI/OC/Kexts folder.
3. Clean snapshot your config.plist using ProperTree to ensure the kext order is correct.

2. Configure BIOS VT-d and System Settings

UEFI mapping changes in the Tahoe update can conflict with virtualization parameters.

• Disable **VT-d** in BIOS, or if you need it enabled, check that DisableIoMapper is set to True in your OpenCore config under Kernel -> Quirks.
• Alternatively, try checking the SystemSettings -> Network -> Ethernet -> Details -> Hardware tab in macOS and change Configure to Manually, Speed to 1000baseT, and Duplex to full-duplex.

3. Check Ethernet Interface Registration

1. Open Terminal and run kextstat | grep Mausi to verify if the driver is loaded in the kernel.
2. If not, reset your network configurations by removing /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist and rebooting your system.