Trying to install Tahoe R9 3900X

[Alex-Microsmeta]

HI! I have altready managed to install Sonoma and Sequoia on a Ryzen 7 5700u miniPC with iGPU fully working with acceleration.
Now I'm trying to create an USB Installer for macOS 26 Tahoe for my AMD Ryzen 9 3900x, Gigabyte Aorus Elite B550m with 32 GB RAM and AMD Radeon Pro wx7100 8 GB, I'm always stuck on early boot with:

[EB.LD.OSF[OPEN] Err(0xE) <"usr\standalone\OS.dmg.root_hash">
[EB.RH.LRH[P!] Err(0xE) <-EB.LD.LF
[EB.BST.FBS|!] Err(0xE) <-EB.RH.LRH
[EB]LOG: EXITTBS:START]

...Despite enabIng/disabling specific B550M settiings as suggested. All my BIOS settings are OK.

 

[Edhawk]

You will need to disable WhateverGreen.kext during the Tahoe installation process, otherwise it will cause a kernel panic. It can be re-enabled once you have reached the Tahoe desktop.

You should be using AppleMCEReporterDisabler.kext in your /EFI/OC/Kexts folder, it is an essential kext for any AMD system.

AppleALC.kext will not work in Tahoe natively. To get it working in Tahoe you need to run a post installation task adding AppleHDA back to the OS. As Apple have removed this essential kext and associated frameworks from their latest and last Intel based macOS release.

The AMD Kernel Patches you are using don't look right for Tahoe, or any other version of macOS. You shouldn't remove any of the patches, even if you know you won't be running the version of macOS they support. It makes life difficult for anyone reviewing your config when trying to confirm they are set correctly.

You need to create a custom USBMap.kext for your system, using Corpnewt's USBMap script (in macOS). Otherwise you could end up with USB issues during the installation.

 

[Edhawk]

As an example of what I use for my B550M system using the same CPU, I have attached a screenshot showing the EFI contents from my OC 1.0.3 EFI. I used this EFI to boot Sonoma and Sequoia. But it does show you how a correctly configured EFI should look for a similar system like yours.

EFI folder contents for similar (Asus) B550M system.

You wouldn't need all the kexts that I am using, as I require some for my Braodcom WiFi and OCLP to work in Sonoma and Sequoia.