My windows installation had been stonewalled by error;
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
Current OS: 10.5.7 Catalina
MacBook Pro with Touch Bar
I'll chime in because I was just having the same issue as you on an iMac Pro that I just received. Out of the box it was running Catalina so I created an admin user and installed Big Sur immediately. I copied the Win10_20H2_v2_English_x64.iso to the desktop, ran Boot Camp Assistant, and got hit with the error you quoted. I deleted and recreated the BC partition a few times but it had no effect. Suspecting a partition map issue (and since I had no data on the iMac yet) I booted to Recovery (Command (⌘)-R) and wiped out the entire partition before reinstalling a fresh, clean copy of Big Sur. After that the problem vanished. Your milage may vary as you likely have data to preserve, but it's worth considering making a backup and starting from a fresh partition. Best of luck!
I'll chime in because I was just having the same issue as you on an iMac Pro that I just received. Out of the box it was running Catalina so I created an admin user and installed Big Sur immediately. I copied the Win10_20H2_v2_English_x64.iso to the desktop, ran Boot Camp Assistant, and got hit with the error you quoted. I deleted and recreated the BC partition a few times but it had no effect. Suspecting a partition map issue (and since I had no data on the iMac yet) I booted to Recovery (Command (⌘)-R) and wiped out the entire partition before reinstalling a fresh, clean copy of Big Sur. After that the problem vanished. Your milage may vary as you likely have data to preserve, but it's worth considering making a backup and starting from a fresh partition. Best of luck!
Remove the current BC/Windows partition using BC Assistant. Disconnect all external peripherals, run SMC and NVRAM Reset and retry BC Assistant and try to install Windows.
Can you post the MD5sum of the W10 ISO?
This is what you should get.
openssl md5 Win10_20H2_v2_English_x64.iso
MD5(Win10_20H2_v2_English_x64.iso)= 10d50d88fac6306a00ddb41e983a046b
Yes, it worked after restoring from my tm backup and retrying BCA, my win10 is up and running.
Thanks!
Now, you can erase the whole disk (not just Macintosh HD), and restore your TM backup and retry BC Assistant.
This looks normal. The error message indicates that the installer created on the internal disk in the OSXRESERVED partition is not created correctly by BC Assistant.
After Windows installation fails, do you see an OSXRESERVED partition left behind by BCA on the disk?
no OSXRESERVED partition, what I got instead was this.
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_APFS Container disk1 391.0 GB disk0s2
3: Microsoft Basic Data BOOTCAMP 109.0 GB disk0s4
/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +391.0 GB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD - Data 237.4 GB disk1s1
2: APFS Volume Macintosh HD 11.2 GB disk1s2
3: APFS Volume Preboot 92.5 MB disk1s3
4: APFS Volume Recovery 528.8 MB disk1s4
5: APFS Volume VM 1.1 GB disk1s5
Do you have any mounted disk images on your Mac?
Can you post the output of
diskutil list
from macOS Terminal?
Do you have a Time Machine backup? If not, can you create one now?
Hi haiku, I am afraid I would not want to format my MacBook again as I had only just wiped my ssd and reinstalled a copy of my Catalina backup in Nov20.
Upgrading to big Sur is out of the question due to a fast battery drain problem
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_APFS Container disk1 500.0 GB disk0s2
/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +500.0 GB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD - Data 210.3 GB disk1s1
2: APFS Volume Macintosh HD 11.2 GB disk1s2
3: APFS Volume Preboot 92.5 MB disk1s3
4: APFS Volume Recovery 528.8 MB disk1s4
5: APFS Volume VM 1.1 GB disk1s5
2019 MacBook Pro 16inch
Win10_20H2_v2_English_x64
microsoft.com
Disconnected all external peripherals, ran SMC and NVRAM Reset and tried again BC Assistant to install Windows.
still same error message.
Bootcamp: Windows cannot locate the disk and partition