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https://dortania.github.io/OpenCore-Install-Guide/troubleshooting/extended/kernel-issues.html#stuck-on-ocb-loadimage-failed-security-violation You should also be able to install Sonoma which should work better I think.

You're installing Catalina right? Did you download the image from Apple following Dortania guide?

That screenshot isn't from the EFI I sent you. That's from OC 0.9.0

Use the EFI I sent and choose macOS Installer. Seems you've already completed the first stage of the installer.

Try this,

You'll need to modify the kernel patches for your CPU but try this successful EFI for a A520M S2H board, https://github.com/jjone/gigabyte-a520m-s2h-hackintosh-opencore-efi

Have you tried either of the kexts mentioned here? https://dortania.github.io/OpenCore-Install-Guide/troubleshooting/extended/userspace-issues.html#sata-drives-not-shown-in-diskutility

Are you able to format it to HFS in Disk Utility?

So it showed then dissapeared? From where exactly? Also please include your system specifications and add them to your signature here, https://forum.amd-osx.com/account/signature Is SATA set to AHCI in your BIOS?

Add the following kext to your EFI kext folder and add it to your config. While in your config add this as a boot arg, e1000=0 Your board has the same LAN as my ASUS X570-F and this is what I use.

Now to sell a kidney to upgrade my AM4 setup :ROFLMAO:

had to make another couple changes just today.

@ssuper2k or @fabiosun Just to confirm it's still fine before it's merged. Please test this. Test it on a USB just in case.

Awesome :D Thanks for testing @ssuper2k Are you going to keep the 9950X now?

I should mention that they never left verbose though. Something else is stalling the boot. I'm unsure if it's the USB controller on the chip or something else as they had alot of verbose messages about USB.

Tested by a user on Discord and now it works... This has some minor changes to get a pull request accepted.

I was hardcoding 100Mhz FSB in the builds they tested. It still wouldn't boot I'm assuming because of the CoreFrequencyID and CoreDivisorID. These builds I'm posting now are attempting to calculate this as it does on 17h/19h. Although according to Linux source AMD Family 1Ah doesn't use...

FSB calculation still isn't working that's what's causing the error. @ssuper2k really appreciate the testing. Could you give this a go. I've altered the calculations and added some debug statements.

Big changes in the version above @ssuper2k if you could test that please, https://forum.amd-osx.com/threads/ryzen-9000.5375/page-3#post-36687

This build should have more success. Found some interesting notes in the Linux source,