Problema con BootCamp "Impossibile individuare il disco e la partizione specificati"

Question

Problema con BootCamp "Impossibile individuare il disco e la partizione specificati"

Non riesco ad installare Windows.

Lancio BootCamp
Seleziono l'ISO di Windows 64bit (ho provato 10 Home e 10 Pro)
Scarica automaticamente e correttamente il software di supporto
Suddivide il disco in partizioni

poi schermata nera e si passa in automatico all'installer di Windows

Avvio programma di installazione
Scelta lingua
Inserimento serial number
Scelta versione (Home o Pro)
ERRORE "Impossibile individuare il disco e la partizione specificati nell'impostazione <ImageInstall> del file risposte per l'installazione automatica. Verificare che tale impostazione faccia riferimento ad una partizione valida, quindi riavviare l'installazione"

Ho provato decine di volte con diverse io ed il risultato è sempre lo stesso. Cosa posso fare? Premetto che ho scollegato qualsiasi dispositivo dal computer. Ho visto una vecchia guarda che suggeriva di modificare il file Xml, ma in queste versioni non è più presente e non so più che cosa fare per risolvere il problema. Ho persino formattato e ripristinare MacOS per vedere se fosse un problema legato al OSX ma il risultato è sempre lo stesso. Per favore aiutatami.

iMac 27" 5K, macOS 10.15

Posted on May 6, 2020 1:58 PM

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Answer 1

Loner T

Level 9

59,536 points

May 6, 2020 5:31 PM in response to CarloFabianelli

Good to know you have done the two resets.

To get the Md5sum, you can run the following command in the directory (or folder) where the ISO is located. Here is an example.

openssl md5 Win10_1909_English_x64.iso 
MD5(Win10_1909_English_x64.iso)= 86c16116ebacf9b29e4766dd479b5a79

openssl sha256 Win10_1909_English_x64.iso 
SHA256(Win10_1909_English_x64.iso)= 01bf1eb643f7e50d0438f4f74fb91468d35cde2c82b07abc1390d47fc6a356be

On your model, BC Assistant creates OSXRESERVED which has the installer, and it is built every time you run BCA, so editing the XML files is not possible. This typically indicates corrupted ISO or internal NVRAM variable being corrupted.

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Answer 2

Loner T

Level 9

59,536 points

May 6, 2020 8:03 PM in response to CarloFabianelli

I have the same values, so your ISO seems to be fine.

openssl md5 Win10_1909_Italian_x64.iso
MD5(Win10_1909_Italian_x64.iso)= 87b6e2bedc17d4d58661f071cef2bbeb
openssl sha256 Win10_1909_Italian_x64.iso
SHA256(Win10_1909_Italian_x64.iso)= 1f191e4783d6544f92857c3d14395908da833ebff91c103ff6086fd28c88679c

My suggestion is to disconnect all external peripherals, except the BT Keyboard/Trackpad. Specifically, I suggest disconnecting all USB devices. You can leave USB Keyboard/Mouse/Trackpad connected.
Remove any existing BC/Windows partitions using BC Assistant only.
Run SMC and NVRAM Reset
I have seen issues with ISOs left in Downloads folder. You may want to move the ISO tp Documents or Desktop or any other folder except Downloads.
Re-run BCA and try to install Windows.

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Answer 3

Loner T

Level 9

59,536 points

May 6, 2020 5:00 PM in response to CarloFabianelli

If you have disconnected all external peripherals, you also need to run a SMC and NVRAM Reset after every failed attempt, before the next attempt.

Also, what is the name and MD5sum of the W10 ISO?

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Answer 4

Loner T

Level 9

59,536 points

May 7, 2020 6:00 PM in response to CarloFabianelli

Please run a SMC and NVRAM Reset, and retry BC Assistant. The EFI No Name also can be created erroneously, because of the ImageInstall error.

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Answer 5

Loner T

Level 9

59,536 points

May 7, 2020 4:47 PM in response to CarloFabianelli

Notice the multiple EFI NO NAME entries. Do not reboot. In Terminal, run

diskutil eraseVolume free free disk1s3

diskutil eraseVolume free free disk1s4

diskutil eraseVolume free free disk1s5

diskutil eraseVolume free free disk1s6

diskutil apfs resizeContainer disk2 0g

diskutil list

and post the output, before we go further.

The reason you these devices (EFI NO NAME) is because you have an external peripheral (a storage device) connected to the iMac during installation of Windows.

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Answer 6

Loner T

Level 9

59,536 points

May 6, 2020 7:05 PM in response to CarloFabianelli

Run Applications -> Utilities -> Terminal.
Type 'openssl md5' in the Terminal window, but do not press Enter/Return yet.
In Finder, locate the ISO, and drag the file to the Terminal Window.
Now press Return/Enter.
Post the output.

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Answer 7

Loner T

Level 9

59,536 points

May 7, 2020 6:14 AM in response to CarloFabianelli

Can you Identify your iMac model - Apple Support exactly? It would also be helpful to see your disk layout.

Can you post the output of

diskutil list

from macOS Terminal?

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Answer 8

Loner T

Level 9

59,536 points

May 6, 2020 9:00 PM in response to CarloFabianelli

CarloFabianelli wrote:

I just retried but I still receive that error message. BC creates OSXRESERVED and BOOTCAMP partition, but the installation doesn't start because of that error.

Your OSXRESERVED seems to be fine. Do the two partitions get removed by BCA automatically after the failure?

Also, if OSXRESERVED is left behind, we can take a look at it.

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Answer 9

May 6, 2020 5:19 PM in response to Loner T

Thanks for answering Loner. I already did it following your old answer in an another post of 2017. I reset both. About MD5sum of the ISO what are you speaking about? Where can I find that? Thanks again for your help

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Answer 10

May 6, 2020 6:04 PM in response to Loner T

I downloaded the ISO from the official site of Windows, the name is Win10_1909_Italian_x64.ISO , would be strange if it is corrupted, also because I downloaded two times to check that. Anyway writing that commands you suggested me I didn't find anything, can you please be more "easy" to describe me how to get it? Is that a file in the ISO or what? That's exactly my problem, I don't have any XML file so I don't know how to solve this problem. Thanks for your patience

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Answer 11

May 6, 2020 7:48 PM in response to Loner T

I just retried but I still receive that error message. BC creates OSXRESERVED and BOOTCAMP partition, but the installation doesn't start because of that error. Here's what there's in my OSXRESERVED directory.

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Answer 12

May 6, 2020 8:22 PM in response to Loner T

I disconnected everything except for power cable, removed the partition you saw in the screen using BCA, I’ve reset SMC and NVRAM (I waited the second reboot and sound typing the combination COMMAND-OPTION-P-R), moved the ISO from download to documents and retried the installation with BCA. I do everything but I always get this **** error message when the installation is going to start.

I really think Apple did a mistake with the last firmware update, I’ve never had problems with Sierra, High Sierra or previous firmware on my old 21.5 iMac I had before this 27” 5K. I would like to install Win7 as well and try to update to Win10 from there, but BCA only supports Win10, I really don’t know how to solve this. I don’t know if it could help but some days ago I had a working BOOTCAMP partition I did with Sierra or High Sierra (I didn’t remember) but I decided to delete and re-install because some BOOTCAMP drivers were not working (like brightness, volume etc from keyboard or some graphic and devices drivers), but If only I had known I would never have done this...

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Answer 13

May 7, 2020 6:12 PM in response to Loner T

I just did the reset of both. Anyway I also have a pen drive named "NO NAME" which I disconnected from the iMac some days ago, I don't If maybe could be part of the error, but seems like if I've something connected or some traces of other things. Btw now I'm trying again with BCA, I'll update you soon

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Answer 14

May 7, 2020 6:28 PM in response to Loner T

I was ready for yet another error message and instead this time I did it and the installation went correctly, I can hardly believe it! Loner thank you, thank you very much indeed. You are incredibly available and clever, without your help I would never have solved this problem! Thank you very much again! Now I’m finishing to set windows settings, thank you very much again.

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Answer 15

May 6, 2020 2:32 PM in response to CarloFabianelli

Sorry I forgot I was writing in Italian, if you don’t understand I can traslate what I wrote

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Problema con BootCamp "Impossibile individuare il disco e la partizione specificati"

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