How to Fix Mojave -> Catalina upgrade - "Macintosh HD - Data" partition?
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
- Boot with
-v keepsyms=1 debug=0x100to identify the exact kernel panic. - Validate your config.plist using ocvalidate.
- 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:
Why is my upgrade from Mojave to Catalina consistently failing and leaving me with two unbootable volumes, "Macintosh HD" and "Macintosh HD - Data"?
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