How to Fix Upgrading from HighSierra to Catalina, no disk to install

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How to Fix Upgrading from HighSierra to Catalina, no disk to install

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:

I followed the guide from the link below using UniBeast to create an external USB.

UniBeast: Install macOS Catalina on Any Supported Intel-based PC

After booting with USB, I got to the recovery console, and from there, I selected to upgrade MacOS to Catalina. Unfortunately, only the external USB was available (locked) and not my High Sierra SSD. My SSD has the HFS file system and I read that Catalina needs the APFS file system.

So, the question is, if the file system prevents me to...

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Author: sdancer75

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