Patrick Ford Posted August 20, 2025 Share Posted August 20, 2025 Hello everyone, I apologize if this has been discussed else where, I did look. I’m trying to run macOS Sequoia installer using OpenCore on an AMD Ryzen 9 9950X (ASUS ROG X870E-E Gaming motherboard, 64 GB RAM, RX 6900 XT). I’ve followed Gabriel Luchina’s osx-proxmox script and also tried customizing my config.plist with OpenCore. However, when I boot, I always get stuck with the following error: BootKernelExtensions.kc.development not found Steps I’ve tried so far: Enabled DisableIoMapper, AppleCpuPmCfgLock, AppleXcpmCfgLock Reordered kexts (Lilu → VirtualSMC → WhateverGreen) Enabled AM5 PCI hotplug patch Disabled SecureBootModel and set ScanPolicy=0 Tried MacPro7,1 But the error persists. Questions: Do I need a specific AMD Zen 4 kernel patch set for Sequoia / Ventura? Are there recommended quirks for AM5 systems (X870E)? Is there a working sample config.plist for Ryzen 9 9950X + RX 6900 XT? Where can I locate a functional EFI or a reliable person I could hire to help me fix this? I’ve attached my config.plist if anyone is willing to review. Thank you in advance for any guidance! — Patrick config.plist Quote Link to comment https://www.insanelymac.com/forum/topic/361548-help-with-macos-sequoia-on-amd-ryzen-9-9950x-opencore-boot-failure/ Share on other sites More sharing options...
fabiosun Posted August 20, 2025 Share Posted August 20, 2025 @Patrick Ford your system could work..but your EFI is a disaster! it misses many parts mandatory to have the chance to boot and ProxMox route is very different to vanilla way! 1) DevirtualizeMMIO quirk and relative MMIO Whitelist area set (or without setting it enabling also a quirk like disableVariableWrite) 2) quirks you have to use are pretty the same of previous x670e platform 3) your Asus could need of additional ACPI patches for your DSDT So, you should build (without hiring no one ) an Opencore debuf EFI enabling SYSReport to extract your DSDT and post on AMD OSX Discord server to the attention of CorpGost (AKA CorpNewt) Usually he produces patches (if you need them) very fast if you like i suggest to read this thread: https://macos86.it/topic/7055-asus-rog-crosshair-x870e-hero-ryzen-9950x/ https://macos86.it/topic/6542-bug-fix-for-am5-new-firmware-motherboards-dsdt-fix/#comments and similar ones Quote Link to comment https://www.insanelymac.com/forum/topic/361548-help-with-macos-sequoia-on-amd-ryzen-9-9950x-opencore-boot-failure/#findComment-2839541 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.