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And I'm back in Windows! Yay! Confirmed: I was able to boot to OC on my NVMe and from there pick my Windows HD, and now here I am, posting from Windows! Of course, I can't see any of my macOS-formatted drives, but I've got a nice little playground on the SSD to work with! When the new 2TB NVMe...

So far, so good! OC comes up if I pick my NVMe as the boot device, and from there I can indeed launch Monterey! At least this part isn't broken.

Thanks @c-o-pr, I believe it turned out to be a combination of the NVMe being present and needing to use one of the Rufus install USBs. I'm booted up into Windows 11 Pro as I write this, so all is good now - but I'd like to leave some breadcrumbs for any others that hit this snag. I tried...

Found something on another site that talked about using diskpart clean and diskpart offline relating to this issue. I tried using diskpart clean on the SSD, and diskpart offline for the NVMe four different ways. With and without BIOS defaults and with the Rufus MBR installer and the Rufus UEFI...

Ok, that didn't work either... I was able to successfully make a bootable MBR USB with Rufus, but I get stuck yet again at the same point regardless if I leave my BIOS set as I have it for OC/Monterey, or set it to the optimized defaults (which include CSM enabled). Interestingly, the Rufus MBR...

OK, tried again using BIOS defaults this time. Same results. Tried running Disk Utility First Aid on SSD. Nothing bad turned up, but I was unable to run it on the NTFS partition, so I erased it to a GUID / MacOS Journaled partition and reran Disk Utility First aid on the newly made disk0s2. It...

Thanks @guindillas, I just did that. I was able to use Rufus to make an NTFS install media using VirtualBox. Turns out there are a few tricks to that, including don’t use VB 7, stick with VB 6.1.40, Also I needed to use a non-standard 8k NTFS block size in order to get Rufus to finish. Those...

Clever idea! Thanks! I've just installed VirtualBox and am downloading the Windows 11 Enterprise VM for it from MS now. I looked at parallels and vmware fusion, but both are paid - and while they do offer a trial period I think I'd be ahead to go with VirtualBox and the free trial of Windows 11...

Well, nuts... That didn't work. I hit the same error in the same place. On the plus side, the MBR USB shows up with just one partition, and reliably boots to the Windows installer. I tried it in both a front USB port and a rear port. Booted from either. I tried it with my normal BIOS config...

Worth a shot! I'll try that next. Thanks! Also, I found this guide that says to use MBR/MS-DOS (FAT) for the USB format, confirming your suggestion. https://jensd.be/1740/windows/create-a-bootable-windows-11-installation-usb-on-macos This is essentially what I did when making my previous USB...

I don't think you're making things worse, and I do appreciate your help. I'll happily try anything I'm able to, and as I hadn't tried your suggestion yet I jumped on it. Each step forward is another clue. Right now I'm thinking the most common denominator is the USB. I'd use rufus if I could...

OK, I tried formatting the SSD as MBR using Disk Utility and that got me to a new error point, though no further and arguably less far than before. The message this time was "Windows installation encountered an unexpected error. Verify that the installation sources are accessible, and restart...

Update: I saved my BIOS settings and switched to the BIOS-generated default "optimized" settings. I also copied the "efi" folder from the USB's WIN11 partition to its EFI partition. Selecting USB P1 (the EFI partition) gets me a blue screen saying something about being unbootable and...

Hmmm... I may have found a clue relating to the USB. Whenever I have the Windows USB inserted and go to the BIOS selector for which disk to boot (F12) I see two partitions for the USB. Selecting P1 on the USB won't boot the system at all, but selecting P2 on the USB does, so that's what I've...

Is there a guide on recommended BIOS settings for installing Windows?

Thanks, @guindillas I am entering Windows through BIOS UEFI. I press F12 and select the UEFI on the USB that will boot to the Windows installer. You may be right, there may be some problem with the USB. I'll follow that link and see what. I can learn. Here's what I know so far: Pretty much...

I'm fairly sure that's wrong. It's contrary to the multiboot guide here https://www.tonymacx86.com/threads/guide-multibooting-uefi-on-separate-drives.198869/page-63, but moreover I just tried it and it definitely didn't work. I gave it a shot using the Windows installer to delete both...

Hi Guys, I've got a working Hackintosh with OpenCore 0.8.3 able to boot Monterey (12.6) from my Samsung 500GB NVMe. My hack also has a SanDisk 240GB SSD, a 4-TB internal HDD, and an 8-TB internal HDD. I use the last two just for data and can unplug them if need be for this install. What I'd...

I am soooo stuck. I’ve tried every combo I can think of. I’ve unplugged the internal data drives so SDSSD240 is disk 0, and I’ve tried with an empty EFI folder and with one copied from the Win11 install USB. Depending on how I’ve come at it, I either get the dreaded “Windows could not prepare...

Rats! That did not help. Got stuck in the exact same place... I'm reformatting the Primary partition with a low-level NTFS format now and will follow with a low-level format of the EFI partition just for good measure. Maybe that will help? Really not certain... EDIT: and... that didn't help...