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The IOMMU entry should be Disabled, not set to Auto. Which SSD/HDD or NVMe drive are you using for macOS? Do you have any other drives present in the system? If yes, can you temporarily remove the other OS or data drive(s) during the macOS installation. It/they can be reconnected once...

1. The system not shutting down and auto rebooting is a common issue on a Hack, when USB ports are not correctly defined and configured in macOS. As uncalled for USB power events prevent the system shutting down. Simple answer to this is for you to generate a custom USB configuration/kext for...

OK, I have attached a copy of the Results folder from SSDTTime having used the OEM folder you provided to generate these custom SSDT's and associated ACPI patches. Contents of Results folder I would recommend you do the following: Create a copy of your current working EFI folder on a spare...

If you post a copy of your systems ACPI tables I will have a look and see which custom SSDT’s your motherboard requires. The ACPI tables can be obtained from a few different sources. 1. Hackintool’s Utilities tab - Dump ACPI icon. 2. SSDTTime in Windows, specific option to download the tables...

Legacy mode USB should be enabled, well that is what I do when the option is available in the Bios. You have 2 x USB Controllers named XH00. Currently the ports from both controllers are mixed together and it is not clear which port belongs to each controller. The easiest way to see which...

I removed apfs_aligned.efi because I have never needed that driver on any of the AMD Hacks I have built. Including a couple of B450 systems for my nephew’s. Not sure what else to suggest.

Lacking a compatible GPU you would struggle to get a bare metal installation of macOS running with any fluidity. You should look into running macOS in a Virtual Machine on your existing Windows drive. See the comprehensive guide linked below...

I had to use a third party app. The native zip app in macOS wouldn’t open the zipped folder.

There were a few options that you might need to look at. The first image on page 5 of 7. SuperIO is common name for Serial Port, it should be disabled. Page 7 of 7 NBIO sub-menu usually contains a few common bios entries that may need attention. Otherwise the bios looks OK.

There is a simple fix for the Mac Pro memory issue, using RestrictEvents and adding revpatch=auto boot argument to your config.plist.

Try this revised EFI-2. I am not sure using the SMBIOS for an iMac20,1 is the best when running an AMD Hack. You might be better served using the iMacPro1,1 or MacPro7,1. I found I had issues when using the iMac20,1 SMBIOS on my mini PC AMD hacks, which didn't occur once I changed the SMBIOS...

Have you set your bios as recommended in the Dortania Ryzen guide? https://dortania.github.io/OpenCore-Install-Guide/AMD/zen.html#amd-bios-settings I am specifically interested to know if you have enabled Above 4G Decoding, as this is an essential setting, which if not enabled requires the...

Boot argument required for RX 6600 is agdpmod=pikera. If you use WhateverGreen.kext this boot argument is essential to fix a common error - Black Screen on login screen with AMD Navi GPU's. If you use NootRX.kext then the boot argument (fix) is built into the kext. However, this kext is not...

No, this I think is going to be caused by an error on your part. Something in your EFI or config.plist is most likely set incorrectly. I use the OC GUI on all my Hacks (approx 26 at last count) and don’t have any issues setting the default disk in Bios or the OC boot loader, using the settings...

I assume the following: That you have the OpenCanopy.efi driver in your /EFI/OC/Drivers folder with a corresponding entry in your config.plist? That you have a populated Resources folder in your EFI folder? If not use the link below, select the green CODE button and download the OcBinaryData...

ClearNvram requires a manual reboot of the system for the action to occur. It is why it is better to use ResetNvram, as the system is automatically rebooted as part of the action to remove the old NVRAM entries. Follow the Dortania instructions provided in the link above, but make sure you...

Yes, that is correct for a SATA SSD.

Sounds like you are using the Text based Picker List on the OpenCore boot screen. Switching to the OpenCore GUI boot screen might help with the problem, as it is less likely you will double hit the left arrow when selecting the Windows icon. See this section of the Dortania guide for details...

Post a copy of the EFI folder you are using so we can see what might need attention. When dual booting macOS and Windows it is usually best to have each OS on a separate drive/SSD/NVMe is that the case in this instance? It is also advisable to remove any Window or Data drives from the system...

Welcome to the forum. Start a new thread setting out any issues you need help to resolve for your B550m system and we will see what help can be provided.