How to Fix opencore MacOS Big Sur install error Err(0xE) <"usr\\standalone\\OS.dmg.root_hash">

How to Fix opencore MacOS Big Sur install error Err(0xE) <"usr\\standalone\\OS.dmg.root_hash">

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 working to get MacOS Big Sur installed on my newly built machine.

System Configuration:
Gigabyte Z490 Aorus Elite
Intel Core i7-10700KF
Corsair CMK32GX4M2A2666C16 Vengeance DDR4 4x16GB = 64GB
Gigabyte AORUS Radeon RX 580 8GB Graphic Card
Samsung 980 SSD 1TB M.2 NVMe

I can't get past these errors:

202:354 00:150 AAPL: #[EB.LD.LF|IN] 0 1 <"usr\\standalone\\OS.dmg.root_hash"> <"0">
202:487 00:132 AAPL: #[EB.LD.OFS|OPEN!] Err(0xE) <"usr\\standalone\\OS.dmg.root_hash">
202:616 00:128...

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Author: ajhead42