Cant boot HS installation: persistent enumeration failures.

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iNIKEL

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May 20, 2020
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Hi!
I've recently made a mistake: installed Mac OS Catalina on PC with pascal GPU.
My setup is:
Ryzen 9 3900x
Gigabyte x570 xtreme board
32gb ram
Samsung 970 evo plus and pro M2, crucial sata SSD
GTX 1080.

I used opencore 0.5.8 for installing and running Mac OS Catalina. Everything was easy and butter smooth. No issues after boot except missing GPU acceleration.
Now I would like to install Mac OS High Sierra instead, and I can’t even boot installer. At some point it configs usb devices with some errors and after all there are "persistent enumeration failures" messages on screen leadind to halt with crossed circle on screen. Tried mapping USB ports manually, generating kext and SSDT, applying patches, downgrading opencore version to 0.5.6 or even 0.5.5.
Any help please?
Screen phtoto and EFI folder are attached. Cant find anything related to this issue.
 

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iNIKEL

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May 20, 2020
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@iNIKEL It shouldn't really matter.
Ok. Thanks.
I have tried your SSDT file without any luck :(
I've even found someone posted full files pack for x570 xtreme and Ryzen 9 on github, noting that its tested on 10.14 and 10.15.
Did not work for me. Same issue. I have feeling that none of changes in kext and acpi patches take effect on my issue.
 

iNIKEL

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May 20, 2020
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Did you add the SSDT to the config? With OpenCore you can't just add the file to the folder.
Sure. Tried with your SSDT only, tried with full SSDT setup for my board, tried without any SSDT. The same halt... Its nearly at the begining of the install booting.

I have Catalina installed on sata SSD drive. Can It cause any interference? There is no bootloader on Catalina drive though. I use opencore on flash drive to boot catalina (it boots like a charm) and both for booting High Sierra installer (there are those nasty errors). And I am full of enthusiasm to change High Sierra installer to Mojave, just for testing.
 

Shaneee

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Mar 13, 2020
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Have you tried using another USB port? Another option is to add GenericUSBXHCI.kext but set it in your config to only load on High Sierra.
 

iNIKEL

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May 20, 2020
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Have you tried using another USB port? Another option is to add GenericUSBXHCI.kext but set it in your config to only load on High Sierra.
yep, tried almost all of the ports. When using GenericUSBXHCI.kext there is panic or whatever causes instant reboot, cant even read verbose.
 

iNIKEL

New member
May 20, 2020
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Have you tried using another USB port? Another option is to add GenericUSBXHCI.kext but set it in your config to only load on High Sierra.
yep, tried almost all of the ports. When using GenericUSBXHCI.kext there is panic or whatever causes instant reboot, cant even read verbose.
Have you tried using another USB port? Another option is to add GenericUSBXHCI.kext but set it in your config to only load on High Sierra.
Anyway, thanks for your suggestions. Looks like it's step further now. Possbily it was last port i did not tried (the one my mouse connected) or changing model to iMac Pro helped. Now installer boots and there is animation telling to enable mouse or keyboard.