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Level 1

9 points

Windows Boot Manager error, winload.exe

Hello,

MacPro 3,1

Windows 7 & 10.9.5

Mac OS and Windows partition on same disk

I've been reading threads here on the apple board and elsewhere on the net. Tried the easier fixes with no luck. (No USB devices on boot, zapping Pram, CommandS fsck operations, etc)

I've had no hardware or mac os updates in a very long time. Bootcamp was working fine for years, then suddenly not working.

I'm wondering if I do have some corruption going on..

My Windows 7 (64), is a Vista upgrade

DiskUtil list

Diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

Many thanks for any help!

Andre

Posted on Jun 25, 2021 8:15 PM

Similar questions

60 replies

Loner T

Level 9

59,477 points

Jun 27, 2021 4:44 PM in response to dreko71

Are you currently booted from a macOS DVD or a different boot disk which I presume is writeable?

Loner T

Level 9

59,477 points

Jun 28, 2021 5:05 AM in response to dreko71

If you install GPT Fdisk on the USB, we should be able to use it.

Loner T

Level 9

59,477 points

Jun 28, 2021 10:49 AM in response to dreko71

After GDisk is installed, run

sudo gdisk -l /dev/disk0

sudo gdisk -l /dev/disk1

and post the output.

dreko71 Author

Level 1

9 points

Jun 28, 2021 3:24 PM in response to Loner T

Can I run GDisk in terminal, off the TechTool Pro eDisk Mac environment?

It appears GDisk tools are all windows programs, no?

sorry a bit confused

Loner T

Level 9

59,477 points

Jun 28, 2021 3:50 PM in response to dreko71

The command is "-l /dev/disk1". It is a minus sign followed by a lowercase L followed by a space followed by "/dev/disk0" or "/dev/disk1".

Loner T

Level 9

59,477 points

Jun 28, 2021 4:18 PM in response to dreko71

Choose 2 (use GPT). This is what we want to recover.

dreko71 Author

Level 1

9 points

Jun 28, 2021 8:37 PM in response to Loner T

Ok, understood. When you say 'run' you mean execute

And do not type the words within the parenthesis.

Just the single character command

I'm assuming start with disk0 first, not disk1

thanks

Loner T

Level 9

59,477 points

Jun 29, 2021 9:58 AM in response to dreko71

Can you reboot and post the output of

diskutil list

dreko71 Author

Level 1

9 points

Jun 29, 2021 10:03 AM in response to dreko71

which boot drive should I select , and then run

diskutil list

reboot to the eDisk from TechTool pro, or try to reboot to the main MacOSX drive?

thanks

Loner T

Level 9

59,477 points

Jun 29, 2021 10:40 AM in response to dreko71

Looks much better. Can you do the same steps on the bootcamp disk?

Loner T

Level 9

59,477 points

Jun 29, 2021 11:22 AM in response to dreko71

Be careful, reboot can renumber disks. Confirm the disk to use by running diskutil list, before you run GDisk on any disk.

Loner T

Level 9

59,477 points

Jun 29, 2021 1:10 PM in response to dreko71

Post the output of latest

sudo gpt -vv -r show /dev/disk2

We can derive the MBR from GPT to ensure they match.

Loner T

Level 9

59,477 points

Jun 29, 2021 1:29 PM in response to dreko71

The GPT entries have been reversed. 40-409600 should be GPT 1, 409640-976101344 should be GPT 2 and the last one should be GPT 3. We will need to recreate the GPT first using GDisk.

dreko71 Author

Level 1

9 points

Jun 29, 2021 1:43 PM in response to Loner T

Ok... but my other disks are working fine.... not sure how this all works

How do we go about recreating the GPT with GDisk?

many thanks again

dreko71 Author

Level 1

9 points

Jul 1, 2021 9:24 AM in response to Loner T

Ok, will do later today then...

much appreciated!

Windows Boot Manager error, winload.exe