How to Fix HDD and SSD missing from disk utility while trying to install Big Sur from USB

By Freirburro
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How to Fix HDD and SSD missing from disk utility while trying to install Big Sur from USB

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. Check if your GPU requires WhateverGreen or specific boot-args (e.g., agdpmod=pikera).
  2. Ensure Metal acceleration is fully supported for your macOS version.
  3. Update Lilu and WhateverGreen to the latest versions.

Verification

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

Original Question:

I am trying to install Mac OS big sur along with my windows 10. I have been following dortania's opencore guide along with a youtube video for the entire process. I managed to boot into my usb but get "busy timeout" error along the way and it takes 10+ minutes to just get into the GUI everytime.

Even tho I get into the GUI, I can't find my HDD or SSD in the disk utilities.

Specs:

Acer Predator Helios 300 i7 7th gen Nvidia GTX 1050ti I have a 128gb ssd where my Windows 10 installation is located along with a 1TB hdd where I would like to install mac.

Images:

Here is the image of the busy timeout error which I suspect might be the cause: busy timeout

Here is the image of the disk utility screen which I get: Disk Utility

submitted by /u/ProbabilisticPotato
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