Boot Camp/Windows Error

Question

Level 1

8 points

Boot Camp/Windows Error

I’m trying to install Windows through Boot Camp Assistance on my iMac 27-inch 2017 (macOS Big Sur), but I keep getting this error message:

Windows cannot locate the disk and partition specified in the unattend answer file’s <ImageInstall> setting. Make sure the setting references a valid partitition and restart the installation

I have no external drives connected with USBs etc., I have reset NVRAM and SMC, the ISO file is on my desktop (even tried with the ISO on USB).

However, I have a Fusion Drive and I wonder wether the problem is due to this. When I boot up holding option key (before I create a Windows partition), I see that I have two EFIs. The one to the right doesn’t seem to work. Can/should I delete this one, and if so; how?

Thank you so much for your help!

Posted on Sep 1, 2020 9:54 AM

Reply

Answer 1

Loner T

Level 9

59,536 points

Sep 1, 2020 2:47 PM in response to MortenOS84

macOS Big Sur is not yet a public release.

However, your issue is unrelated to a Fusion drive. This typically indicates that ISO was corrupted during download. Verify the MD5sum for the ISO file.

Reply

Answer 2

Loner T

Level 9

59,536 points

Sep 2, 2020 6:20 AM in response to MortenOS84

Click on Applications -> Utilities -> Terminal.
Locate the ISO in macOS Finder.
In Terminal, enter
- openssl md5
- drag the ISO file name to the Terminal window and press Enter/Return
You should see output similar to

openssl md5 Win10_2004_English_x64.iso
MD5(Win10_2004_English_x64.iso)= 3cf9848ce17271e7c895366bdad98a8e

The ISO can be block-corrupted when downloading it over a wireless connection.

Reply

Answer 3

Loner T

Level 9

59,536 points

Sep 2, 2020 6:20 AM in response to MortenOS84

Click on Applications -> Utilities -> Terminal.
Locate the ISO in macOS Finder.
In Terminal, enter
- openssl md5
- drag the ISO file name to the Terminal window and press Enter/Return
You should see output similar to

openssl md5 Win10_2004_English_x64.iso
MD5(Win10_2004_English_x64.iso)= 3cf9848ce17271e7c895366bdad98a8e

The ISO can be block-corrupted when downloading it over a wireless connection.

Reply

Answer 4

Loner T

Level 9

59,536 points

Sep 2, 2020 1:18 PM in response to MortenOS84

MortenOS84 wrote:

Thanks for getting back to me!

I did exactly what you described but I can´t get Terminal to run the commands. I don´t know what to do. This is how my output looks like:

https://discussions.apple.com/content/attachment/c6514ad8-191d-4493-be0f-a1e9025dac60

You need a space between 'md5' and '/Users/nevergood/...'

Reply

Answer 5

MortenOS84 Author

Level 1

8 points

Sep 2, 2020 12:04 AM in response to Loner T

Thanks! But I downloaded the ISO from Microsoft - how can it be corrupted? And how do I verify the MD5sum for the ISO file?

I´m not that technical, you see.

Reply

Answer 6

MortenOS84 Author

Level 1

8 points

Sep 2, 2020 7:09 AM in response to Loner T

Thanks for getting back to me!

I did exactly what you described but I can´t get Terminal to run the commands. I don´t know what to do. This is how my output looks like:

This is the ISO

Reply

Boot Camp/Windows Error

Similar questions