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Catalina boot camp with iMAC 27 Fusion drive

Upgraded to Catalina and I have been battling with bootcamp for months with Apple and Microsoft each accusing each other of being incompatible over the phone.


Originally I was able to install Win10, however during the required windows reboots within boot camp during final install it just kept rebooting over and over again until giving up in an error.


I unsuccessfully tried to install Bootcamp on an external HD


Now, after the most recent apple update, Boot camp gets stuck on partitioning the disk and says that it has become unresponsive.


I attempted the solution in this thread, but nothing seems to help.

https://discussions.apple.com/thread/250776605?answerId=251481454022#251481454022


Any ideas?


Nick

Posted on Feb 7, 2020 4:56 PM

Reply
Question marked as Top-ranking reply

Posted on Feb 9, 2020 9:07 PM

We can address the partitioning issue, independent of the BSoD issues. In most cases, APFS corruption or the inability to create OSXRESERVED (Windows Installer) is typically the issue. If you have any external storage or peripherals connected, BCA is not very stable.

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12 replies

Feb 9, 2020 2:48 PM in response to Oceanick83

Post a screen shot, if you prefer. Your disk list seems to be fine.


BSoDs can be due to MacHALDriver.sys or the AMD GPU driver. Other drivers are not as fussy as these two. Before you reboot for BC drivers installation, can you check the version of both drivers.


Out of the following,


Graphics

  • 3.4GHz
  • Radeon Pro 570 with 4GB of VRAM
  • 3.5GHz
  • Radeon Pro 575 with 4GB of VRAM
  • 3.8GHz
  • Radeon Pro 580 with 8GB of VRAM


which GPU do you have?

Feb 9, 2020 4:52 PM in response to Loner T

Here are my full system specs:


iMac (Retina 5K, 27-inch, 2017)

4.2 GHz Quad-Core Intel Core i7

40 GB 2400 MHz DDR4

Radeon Pro 580 8 GB


Radeon Pro 580

Driver date: 2017-01-18

Driver Version: 21.19.512.1


machaldriver.sys

I was unable to find this in device manager, but i did find the file under c/windows/system32/drivers.

couldn't find a version #, but the date modified was 2017-03-28


diskutil apfs list

screenshot attached


Thanks a million

Feb 9, 2020 2:32 PM in response to Loner T

2017 iMac 27"

with 3TB Fusion drive


Did a full reformat yesterday and bypassed the issue of bootcamp getting stuck. Now the original problem persists.

Installs windows fine, continued with boot camp and Broadcom installs within. I can even install third party software and use them, but upon restart, the spinning wheel freezes and eventually gives you a blue screen. I cant get back into windows again without deleting the partition only to start the doomed process again.


here are the readouts.


/dev/disk0 (internal, physical):

  #:            TYPE NAME          SIZE    IDENTIFIER

  0:   GUID_partition_scheme            *121.3 GB  disk0

  1:            EFI EFI           314.6 MB  disk0s1

  2:         Apple_APFS Container disk2     121.0 GB  disk0s2


/dev/disk1 (internal, physical):

  #:            TYPE NAME          SIZE    IDENTIFIER

  0:   GUID_partition_scheme            *3.0 TB   disk1

  1:            EFI EFI           209.7 MB  disk1s1

  2:         Apple_APFS Container disk2     2.6 TB   disk1s2

  3:    Microsoft Basic Data BOOTCAMP        370.4 GB  disk1s4


/dev/disk2 (synthesized):

  #:            TYPE NAME          SIZE    IDENTIFIER

  0:   APFS Container Scheme -           +2.8 TB   disk2

                 Physical Stores disk0s2, disk1s2

  1:        APFS Volume Mac HD - Data      894.1 GB  disk2s1

  2:        APFS Volume Preboot         82.5 MB  disk2s2

  3:        APFS Volume Recovery        526.6 MB  disk2s3

  4:        APFS Volume VM           2.1 GB   disk2s4

  5:        APFS Volume Mac HD         10.8 GB  disk2s5

Feb 9, 2020 8:38 PM in response to Loner T

Have tried with 1607 X64, 1903_x64 and 1909_x64.

All exactly the same problem which had never occurred prior to upgrading to Catalina.

an endless cycle of freezes and reboots with a BSoD ending.


Can't believe my 2.5 year old top of the line iMac is "older" now haha.


There must be something that we're missing as i cant find anyone else with this problem.


The OSX side functions flawlessly.

Feb 9, 2020 8:47 PM in response to Oceanick83


Oceanick83 wrote:

All exactly the same problem which had never occurred prior to upgrading to Catalina.
an endless cycle of freezes and reboots with a BSoD ending.

Do you want to consider going back to Mojave?

Can't believe my 2.5 year old top of the line iMac is "older" now haha.

Planned obsolescence is the the new revenue growth model. 😉

There must be something that we're missing as i cant find anyone else with this problem.

Lots of under-the-hood 'improvements' in Catalina, which are problematic. Do you need the features of Catalina?

The OSX side functions flawlessly.

This is Apple's Bread-and-Butter. Windows OTOH....

Catalina boot camp with iMAC 27 Fusion drive

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