How to Fix Howdy -- Installing macOS on my External HDD

By Freirburro
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How to Fix Howdy -- Installing macOS on my External HDD

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 there

I am looking to install macOS Catalina on an external hard drive, that of which is not an SSD but rather a plain, old HDD. I found a guide that can be used to install the OS on a partition within an internal hard drive in my PC, but I need to do it on an external.

The guide uses Unibeast and Multibeast --https://www.macworld.co.uk/how-to/install-macos-pc-3632329/

Is it possible to use this method and create a bootable macOS system on my external drive, with Unibeast and all of that? The reason I would like to do this is that I would like to run Logic Pro X using the much more powerful system hardware on my PC as compared with my Macbook Pro, which frankly is not an optimal circumstance for doing that. The above guide does not specify whether or not you have the option to select an external drive to install the operating system onto.

I'm also going to be using the external to install from, which I read in comments section for another reddit post is indeed possible by creating a partition on the external drive that is 16 gb in size, or less.

Any informed guidance would be massively appreciated! Also, happy new year 2021 here we goooo lol...

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