How to Fix Big Sur 11.3 Update Broke USB 3

How to Fix Big Sur 11.3 Update Broke USB 3

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:

Update but stuck at iCloud sign in screen due to loss of USB 3.x ports (mouse and keyboard). Forced restarted and still no mouse or keyboard. Checked other ports and found usb 2.0 ports working which were off in my OpenCore port mapping kext. Replaced with USBInjectAll but still same issue only 2.0 ports working. My backup 11.2.3 (before I updated today) works fine. I use latest OpenCore with iMac20,1 SMBIOS

Something has changed.

update: I tested with latest...

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Author: JBX