Installing Windows 10 (1909) on a Mac Pro 5,1 alongside Mojave?

[J3NK0M80]

Hello!

I am wondering what the best method is to get the most recent Windows 10 version (1909) working effectively with my Mac Pro 4,1 -> 5,1?

I've been following the tutorial on how to install boot camp without a boot screen by @h9826790 (https://forums.macrumors.com/threads/how-to-boot-camp-without-a-boot-screen.2114788/post-26689280). However, the user's last update (Feb 2020) states that Boot Camp 6.1.9 will only allow users boot to the latest macOS drive, and that Windows 10 (1909) does not allow Bootcamp 5 package to be installed anymore. Is this method, using Brigadier and Boot Camp, now redundant? Has anyone discovered a work around?

I have decided to create this new thread to create a comprehensive and up-to-date guide for this problem.

Thank you!

My machine:
Model: Mac Pro 2009 4,1 -> 5,1
CPU: 2 x 6 core Intel 5670 2.93 GHz
GPU: Sapphire Pulse RX580 8GB
Storage: 250GB SSD (Mojave), 1TB HDD (extra Mac space), 1TB HDD (dedicated to Windows).

 

[startergo]

Hello!

I am wondering what the best method is to get the most recent Windows 10 version (1909) working effectively with my Mac Pro 4,1 -> 5,1?

I've been following the tutorial on how to install boot camp without a boot screen by @h9826790 (https://forums.macrumors.com/threads/how-to-boot-camp-without-a-boot-screen.2114788/post-26689280). However, the user's last update (Feb 2020) states that Boot Camp 6.1.9 will only allow users boot to the latest macOS drive, and that Windows 10 (1909) does not allow Bootcamp 5 package to be installed anymore. Is this method, using Brigadier and Boot Camp, now redundant? Has anyone discovered a work around?

I have decided to create this new thread to create a comprehensive and up-to-date guide for this problem.

Thank you!

My machine:
Model: Mac Pro 2009 4,1 -> 5,1
CPU: 2 x 6 core Intel 5670 2.93 GHz
GPU: Sapphire Pulse RX580 8GB
Storage: 250GB SSD (Mojave), 1TB HDD (extra Mac space), 1TB HDD (dedicated to Windows).

cMP5,1 and Apple BOOTCAMP assistant for creating Windows 10 partition

Here is a little study on the official BOOTCAMP for the cMP5,1. It may be valid for other Macs, but it is not guaranteed. As you may know BOOTCAMP assistant throws this message, when you try to open it in an APFS formatted drive (Mojave and Catalina): I modified the BOOTCAMP Info.plist from a...

forums.macrumors.com

 

[J3NK0M80]

Just to update this:

I have now got Windows 10 (1909) working some-what smoothly. I have followed the instructions here @h9826790 (https://forums.macrumors.com/threads/how-to-boot-camp-without-a-boot-screen.2114788/post-26689280), to install Windows 10 legacy via disk and install RealTek and bluetooth packages for the MacPro5,1. I have stopped the tutorial at this point, and not installed BootCamp6 as I have heard of issues occurring in relation to this. I have also installed the up-to-date drivers for my GPU from AMD.

Everything is working great and as expected. To get from Mac -> Windows, I change my start up disk in system preferences. And to get back from Windows -> Mac, I need to reset the NVRAM.

 

[flyproductions]

And to get back from Windows -> Mac, I need to reset the NVRAM.

Hmmm, annoying!

As i have a GPU supporting the bootscreen and with that the mac's bootmanager (at least with one of it's two bioses) it is somewhat easier for me. But for some reason i prefer to run the card with it's genuine PC-bios. So i would really like to be able to choose the boot volume in Windows too. Is there really no way to get the Bootcamp-Assistant app working for Win 10 1909 in the cMP 5,1 again?