How to Fix Big Sur 11.3.1 update breaks USB 3.0

By Big Sur

How to Fix Big Sur 11.3.1 update breaks USB 3.0

This mini-guide provides a structural approach to troubleshoot and fix the issue.

Prerequisites

  • Confirm your hardware specifications (CPU, GPU, Motherboard).
  • Ensure you have a bootable recovery USB and backup your EFI.

Fix Steps

  1. Boot with -v keepsyms=1 debug=0x100 to identify the exact kernel panic.
  2. Validate your config.plist using ocvalidate.
  3. Ensure your EFI matches the Dortania guide specifications for your CPU generation.

Verification

  • Reboot and verify if the functionality is restored and stable under typical usage.

Original Question:

Hi all,


I have an issue with two different motherboards, one Asus Z370 and one Gigabyte Z390, and USB once I moved to Big Sur 11.3.1 from Mojave.
Both motherboard have USB definition AND with BOTH motherboard after update to 11.3.1 USB 2/3 doesn't work anymore.

I tested both motherboard with the .aml USB definition and with the hackintool kext.
I've also done in both cases a fresh new .aml and .kext using hackintool with the latest USBInjectAll but the problem persists.
I have reset...

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Author: zzmadd

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