Cloning BootCamp to external SSD Drive

Winclone
1

Hello, I am currently having issues booting into Windows on the External SSD Drive. I used Winclone to clone the Bootcamp partition, then restored the image to the external SSD, injected the Apple SSD Driver. Restarting computer, I boot into windows, the windows logo comes up begins to load then Blue screen, Inaccessible_boot_device. I have restarted computer numerous times with the same results, I have added make EFI bootable, no luck, same scenario, tried legacy but that just states no bootable drive detected.

Any suggestions on what to do please. I need to get back into my windows ASAP for work.
I have a 27 inch iMac Late 2013 with Internal SSD (which works fine for the Mac OS) I am on Mac OS Catalina 10.15.5

Original bootcamp partition was part of the local (internal HD) partition. I upgraded the internal drive to an SSD Drive.

Please HELP

2

Here is what I found after MUCH work.

You need to do two registry edits using RegEdit, before you clone (or via Parallels if you have the external drive)

Under HKEY_LOCAL_MACHINE\SYSTEM\:

  1. Under HardwareConfig Click on entry with a bunch of numbers (Its a UUID) and change BootDriverFlags to 14 in hexadecimal.
  2. Under MountedDevices delete all entries, then delete MountedDevices complete.

I did both and this worked great for me.

3

Thank you @apple4ever! I had this exact same problem due to moving my bootcamp partition to an external drive and your two steps fixed the problem immediately!

4

Interesting. I’ll see if we can replicate it and add that as a menu command.

tim

5

Those registry changes worked for me as well (100 GB partition on a 2018 Mac mini internal SSD to an external SSD). Much appreciated, @apple4ever

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