If you use Boot Camp to run Windows on your Mac, you can visit the AMD website to download the latest version of their drivers for Windows. Hey there wonderful Mac forum folk, I am hoping I can get some advice or if this scenario has been posted a million times that you point me in the right direction for a guide on how to get Bootcamp working on a Mac Pro 5,1 on Mojave with a upgraded video card (so I don’t get the pre boot screens). Neither support installing Boot Camp on an external hard drive. Boot Camp does not support the installation of Windows onto a Mac using a Mac Pro RAID card or software RAID. However, 32 bit-versions of Windows 7 and 8, as well as Windows XP, Windows Vista, and Enterprise versions of Windows 7 and Windows 8 are not supported by Boot Camp 5.1. Update AMD graphics drivers for Windows in Boot Camp.
How-to: How to install Windows onto your Mac. Boot Camp Assistant comes pre-installed on your Mac. Download your copy of Windows 10, then let Boot Camp Assistant walk you through the installation steps. Boot Camp is a utility that comes with your Mac and lets you switch between macOS and Windows.