How to Fix Big Sur Install - Bless failed with error num: 3

How to Fix Big Sur Install - Bless failed with error num: 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:

Hey guys, the installation of Big Sur gets down to about 11min and throws an error as seen in attached photos. Any help with this would be much appreciated.

I have tried clearing CMOS, installing on both APFS and MEJ and updating to latest version of clover and no luck.

Author: liamo127