Wireless Subsystem Diagnostic: Restoring Native Wi-Fi & Bluetooth Stacks on macOS

Diagnostic Overview & Architectural Analysis

Intermittent Wi-Fi disconnects, broken Bluetooth Low Energy (BLE) peripheral pairings, and AirDrop dropouts result from driver mismatches between AirportItlwm, BlueToolFixup, and macOS network subsystems. Synchronizing driver revisions ensures seamless networking.

Comprehensive Step-by-Step Resolution Protocol

1. Align Driver Build with macOS Kernel Release: Use the dedicated AirportItlwm or Broadcom binary specifically compiled for your exact macOS release (e.g. Sequoia, Sonoma, Ventura, Tahoe).
2. Configure Bluetooth Firmware Stack: For Intel wireless controllers on Monterey and higher, inject IntelBluetoothFirmware.kext paired with BlueToolFixup.kext, leaving legacy injector kexts disabled.
3. Purge Stale Network Preferences & State Plists: Clear corrupted networking configuration caches from the system library to reset network interface mappings.
4. Perform ACPI USB Controller Mapping: Verify the internal USB port powering the Bluetooth controller is mapped as Internal (255 / 0xFF) to ensure proper sleep/wake power state transitions.

Network Diagnostics & Configuration Reset Commands

1. Reset Corrupted macOS Network Preferences:

sudo rm -f /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
sudo rm -f /Library/Preferences/SystemConfiguration/preferences.plist
sudo killall -HUP mDNSResponder

2. Check Active Wireless & Bluetooth Kernel Extensions:

kextstat | grep -E "itlwm|BlueTool|IntelBluetooth|Airport"

Verification Checklist

• System boots reliably across multiple consecutive cold starts without verbose panics.
• Target hardware components (Graphics, Audio, Wi-Fi/Bluetooth, NVMe) enumerate with full native capabilities in System Information.
• Sleep and wake cycles transition smoothly without kernel panics or peripheral disconnects.
• A clean, verified backup of the working EFI partition is stored on an external recovery device.

Rollback Protocol

• Boot directly from your emergency external FAT32 USB drive containing the baseline EFI configuration.
• Clear NVRAM from the OpenCore boot picker to purge experimental boot arguments and variables.
• Restore system volume snapshots via Time Machine if root filesystem patches were applied.

Community Case Context