bootmgr is corrupt

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daz_f Author

Level 1

4 points

bootmgr is corrupt

I have tried installing Windows 10 on my 2013 rMBP

Ran bootcamp with a iso from Microsoft website

Bootcamp creates the usb drive and I select 150GB to partition for the install

windows 10 installs fine and reboots

on rebooting i get the following message

Bootmgr image is corrupt. the system cannot boot

I have ran diskutil list in terminal details below

Darren@Darrens-MBP ~ % diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_APFS Container disk1 500.1 GB disk0s2

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +500.1 GB disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD - Data 139.8 GB disk1s1

2: APFS Volume Preboot 81.3 MB disk1s2

3: APFS Volume Recovery 525.8 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

5: APFS Volume Macintosh HD 11.2 GB disk1s5

so far i have erased the drive and reinstalled Catalina fresh but still get the error above on trying to install bootcamp

yet again I have removed windows 10 via bootcamp other wise all i get is the above error and unable to boot OS X unless i use the options key to select it

any help is much appreciated

Posted on Mar 29, 2021 8:18 AM

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Answer 1

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daz_f Author

Level 1

4 points

Mar 31, 2021 5:45 AM in response to Loner T

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Answer 2

daz_f Author

Level 1

4 points

Mar 31, 2021 6:53 AM in response to Loner T

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Answer 3

daz_f Author

Level 1

4 points

Mar 31, 2021 1:14 PM in response to Loner T

I have tried a 2004 ISO and Win 10 is now installed without any issues.

Do you advise to update to latest version or ignore it

I am in Win 10 with Bootcamp drivers now installing

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Answer 4

Loner T

Level 9

59,536 points

Mar 31, 2021 8:46 AM in response to daz_f

You currently do not have a Bootcamp/Windows partition. What is the current macOS version?

Also, your early 2013 Mac should have three Options/Tasks - Create, Download and Install (or Remove).

Create (+Download) uses a USB2 Flash drive of 16GB to create a W10 installer
Install uses the USB2 installer to partition and install Windows.

If the partitioning works and the installer starts, but the Boot configuration update fails, it is possible that the current macOS version/BC Assistant does not work properly with a 2013 Mac.

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Answer 5

Loner T

Level 9

59,536 points

Mar 31, 2021 11:50 AM in response to daz_f

If you use Create+Download, you need to use these options only once. Once you have a USB2 Installer built, you can use it repeatedly for the Install option. One issue that I have seen frequently is that (2015 and) older Macs are not supported well in the current W10 20xx releases. You may need to find an older W10 ISO (19xx or 18xx).

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Answer 6

Loner T

Level 9

59,536 points

Mar 29, 2021 11:08 AM in response to daz_f

Are you manually choosing BIOS or EFI Boot from the USB during the installation?

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Answer 7

Loner T

Level 9

59,536 points

Mar 31, 2021 5:32 AM in response to daz_f

From macOS Terminal, post the output of

diskutil list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

We can check the current state.

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Answer 8

Loner T

Level 9

59,536 points

Mar 31, 2021 5:15 AM in response to daz_f

MPT is very nasty tool. On your Mac model, the internal disk has an underlying GUID partition, with a MBR overlay. MPT causes problems in this case with corrupting the synchronized layout. This can cause booting issues.

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