Booting Windows from external Thunderbolt on Macbook Pro 2019

Charangel wrote:

1. I have a Macbook pro, i9 2,4 Ghz, 64 GB ram, AMD Radeon. I am trying to set up an ADATA SE920 external SSD with bootable Windows 10/11. It simply does not work.

I set up Windows via Bootcamp, then tranfered it with WinToUsb to the external drive. On booting it showed the macOS installation, the Bootcamp and the EFI installation (external). All perfect. When I removed the bootcamp, the system crashed. I couldn't boot from the external drive and when I let it boot normally macOS, it automativally restarted always on 2:50. So I had to reinstall everything (recovery).

2. I tried different ways of installing (via WinToUSB) from a windows PC Windows on the external Thunderbolt drive. (GPT for UEFI, MBR for BIOS and UEFI, Legacy, VHDX, simply everything). The drive shows up on multiboot (Macbook pro) as "windows" (not EFI) and by choosing it, after a few seconds showing windows loading, it crashes (blue screen - inaccessible boot device). I fortgot to mention that I downloaded WindowsSuppport from Bootcamp and included it when installing windows.

Any suggestion???

You can however run Windows in a Virtual Machine on your Mac—

ex

Parallels Desktop https://www.parallels.com/products/desktop/

VM Fusion Fusion and Workstation - Desktop Hypervisor

VirtualBox Oracle VirtualBox

UTM UTM | Virtual machines for Mac

BootCamp is a shutdown and restart to get to the other OS

A virtual machine you can swipe between OS's like full screen apps as well as drag & drop between OS's.

I found the VM to be easy and trouble free.

I don't believe that either Apple or Microsoft support installing Windows on an external drive.