Resolved Install Windows Tiny11 on external SSD/NVMe from a Sequoia MacBook Pro 16" (2019)

[Mic-M4c]

Hello everyone!

First of all, I wish you a very happy new year 2025!

Now here is my goal: install Windows Tiny11 on an external SSD/NVMe from a MacBook Pro 16" (2019) Sequoia 15.2, with the bootloader allowing me to select macOS or Windows, without BootCamp.

1) I tried with Windows Install: the installation was successful, but I can't see the Windows icon in the boot screen (when the Option key is pressed).
2) I tried to install OpenCore files with OCLP 2.2.0, but no mean, probably because my mac natively supports Sequoia.
3) I disabled the SIP and installed the OpenCore files (1.0.3) in the EFI: I can't see the macOS icons or the Windows icon either.

Can anyone help me?
If the only chance to install Windows Tiny11 is with BootCamp, then I will do it.

 

[Mic-M4c]

Hi folks !
I finally succeeded in installing Windows Tiny11 on an external SSD.
1) I have used Rufus 4.6p to create the bootable Windows system with Tiny11.iso (on the Windows already installed in my cMP 5,1 with OpenCore).
2) I downloaded all the Windows drivers for my MBP 16" (2019) thanks to BootCamp Utility.
3) Installed all those drivers perfectly.
Thank

 

[Sergey-Galan]

1) I tried with Windows Install: the installation was successful, but I can't see the Windows icon in the boot screen (when the Option key is pressed).

Hello. If you tried to install Windows using the Windows Install.App program, most likely you forgot to disable the Deactivate Windows ESP option. In any case, I am glad that you managed to install Windows.

 

[Mic-M4c]

Hi Sergey !
And thank you so much for your fantastical app "Windows Install".
I'm almost pretty sure that I have ticked the Deactivate Windows ESP. I really prefer to use your app and will retry with an other SSD or NVMe and tell you.

 

[Sergey-Galan]

I'm almost pretty sure that I have ticked the Deactivate Windows ESP.

Oh no, no, this feature should be disabled! Activating this function is only necessary for cMP 4.1/5.1 and possibly other computers with legacy boot firmware; in other cases, “Deactivate Windows ESP” must be disabled.

 

[Mic-M4c]

ok ! 🙈

 

[Mic-M4c]

I will install Windows 11 on an external NVMe Samsung 980 Pro in the forthcoming days.
I will use Windows Install with Windows ESP disabled.
I'll let you know, Sergey.

 

[Mic-M4c]

Hi !
I have a put a Samsung NVMe 980 PRO in a Ugreen 40Gbps PCIe 4.0 connected to my MacBook Pro 16" (2019) with Sequioa 15.2.

Thanks Windows Install : I have installed Windows Tiny11 on the external NVMe in 2min 27sec.

I deactivated Windows ESP and have the Windows icon on the bootscreen :

But when booting on the external Windows drive, here comes the devil blue screen :

I will also try with Rufus this evening.
Sergey, please let me know if I did something wrong.
Thanks for your help folks ! 🙏🏻

 

[Sergey-Galan]

Hello. If not difficult, try to install Windows again and save the log (file -> Save log), I will see if the installation process was correct. Try Rufus is also a good idea.

 

[Mic-M4c]

Bad news I don't understand why .

With Windows Install :
> With Windows ESP enabled or disabled > when booting with ALT key pressed, no EFI nor Windows icon.

With Rufus :
> Ble screen (see above) : "Stop code: INACCESSIBLE BOOT DEVICE"

I have at least an SSD Crucial With Windows that is functional With Windows 11 Pro (Tiny), created with Rufus. (see above).
I don't know why it's ok with an external SSD but not with a UGREEN 40Gbps PCIe 4.0 + Samsung NVMe 980 PRO in a 40Gbps PCIe 4.0.
May be I can clone/duplicate the SSD(with Windows) to the NVMe, but neither SuperDuper, nor Disk Utility is able to to this with NTFS formatted disk.

Any idea would be appreciated 🙏🏻

 

[Sergey-Galan]

Windows 11 Pro (Tiny)24H2 or Windows 11 Pro (Tiny)23H2 ?
Can you show me a log?

 

[Mic-M4c]

tiny11_2311_x64.iso

 

[Mic-M4c]

i'm installing again before going to sleep

 

[Mic-M4c]

Sergey,
here is my Log file :

 

[Sergey-Galan]

Sergey,
here is my Log file :

“Mkdir: /Volumes /EFI: Permission Denied” Before installing, try to remove the EFI folder on the EFI section and install Windows 10 for testing

 

[Mic-M4c]

Hi Sergey,
the EFI folder which is on the external NVMe ?
With which app ?

 

[Sergey-Galan]

the EFI folder which is on the external NVMe ?

Yes

With which app ?

Windows Install.app

The same mistake - https://forums.macrumors.com/thread...ith-boot-camp-assistant.2386309/post-33494573 for installation of Windows 11 24h2. Therefore, it makes sense to try Windows 10

 

[Mic-M4c]

Please Sergey :

With Windows Install :
1. I will format the external NVMe in exFat and GUID.
2. How do I remove the EFI folder on the EFI section
3. I will drag a Windows 10 normal or tiny.
4. That's all ?

 

[Sergey-Galan]

Please Sergey :

With Windows Install :
1. I will format the external NVMe in exFat and GUID.

Yes

2. How do I remove the EFI folder on the EFI section

There are different programs, but you can first format the disk in MBR, and then again in Guid, so you will create an EFI section again.

3. I will drag a Windows 10 normal or tiny.

Better download the original version from the Microsoft website.

4. That's all ?

And don't forget the log)))

 

[Mic-M4c]

Ok I will work on it the evening, after work.🙏🏻

 

[Sergey-Galan]

Ok I will work on it the evening, after work.🙏🏻

If there are problems with the bootloader again, try the test version of the program, there are small corrections.

 

[Mic-M4c]

Hi !
Here is the log file with your Test version and official Windows 11 Pro french ISO.
Same crashing blue screen