How to Fix High Sierra vs Catalina performance in same system

By Catalina
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How to Fix High Sierra vs Catalina performance in same system

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. Review your system logs and verbose boot output for specific error codes.
  2. Ensure your OpenCore and kexts are up to date.
  3. Compare your configuration with the official Dortania guidelines.

Verification

  • Reboot and verify if the functionality is restored and stable under typical usage.

Original Question:

I posted this on another forum here, but it may be more suitable here:

I have both High Sierra and Catalina installed, on 2 respective SSD's. in the same system. However, I get vastly different Geekbench 4 scores for each.

High Sierra Single Core score = 3413
High Sierra Multi Core score = 16183

Catalina Single Core score = 1601
Catalina Multi Core score = 9489

Installed using Unibeast and Multibeast.

As you can see this is a huge difference. Any help would be appreciated.

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Author: two11

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