If you read this through, you might detect a bit of hostility towards Apple. At least Microsoft keeps making sure they build-in compatibility layers for former hardware technologies.
Don't ask me how it works but it does, and frankly it's criminal that Apple has not allowed more modern OS'es on their original MacPro's. It's been proven that it's not a limiting factor as Piker and others have developed boot. I had MacOS That's why I pursued Windows, because I'm not ready to pronounce this hardware investment dead.
I don't blame them on this - it would cause them to have to pay licensing fees to Microsoft. bootcamp won't let me install windows using GPT OR MBR partition style With disk utility, instead of playing around with the partitions on the drive, just select the drive on the left side and create a single exFat partition. Step 1: Step 5: May 8, FYI everyone: I was attempting this convoluted method of making it work and I made a much simpler discovery! The latter one is a better choice because it allows you to manage this job without deleting partitions or losing data.
Step 4: And you can do it by using Diskpart or EaseUS free partition software. Carry out the one best suited to your needs. There are two ways you can choose to get your problem solved. Here you have two choices to fix the issue. And if yes, it might suggest that your hard drive is not configured for UEFI mode.