Upgraded MBP to Sierra. Windows 7 no longer boots-- flashes a blue screen with text after the Microsoft Corporation progress bar goes to about quarter of the way, then goes to the Windows Error Recovery screen, counts down then restarts. Did a fresh Windows 7 Bootcamp install and it worked fine. Restored the original Windows 7 bootcamp and it doesn’t go beyond the Microsoft Corporation progress bar, just like it was initially. Read online that the MBR partition may have been erased by the Sierra upgrade. I don’t know. Can anyone help?
Try switching between legacy and EFI:
tim
Thanks for the response. Tried Legacy and exactly the same thing happens. Tried EFI and all it gives me is a blank black screen with nothing happening. Anything else I could try?
Try restoring with the current beta and see if it helps:
tim
nope, sorry, it didn’t help. it did exactly the same. did the EFI / Legacy as well but no go. anything else?
What model Mac is it?
tim
MacBook Pro (13-inch, Mid 2012)
Can you try disabling SIP and then setting as Legacy / EFI bootable?
tim
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disabled SIP, Legacy boot: flashes a blue screen with text after the Microsoft Corporation progress bar goes to about quarter of the way, then goes to the Windows Error Recovery screen, counts down then restarts.
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disabled SIP, EFI boot: blank black screen with nothing happening
you can check the master boot record by running this in terminal:
fdisk /dev/disk0
It will print out the master boot record partition table. Can you post the output?
tim
Sorry, not too familiar with Terminal. I get this:
fdisk: /dev/disk0: Permission denied
sorry, you have to run it as root. Run like this:
sudo fdisk /dev/disk0
If you still get an error, you’ll need to disable SIP.
Tim
So that is definitely EFI booting and Windows 7 generally requires legacy booting. If SIP is disabled and you select legacy booting, it will write a new MBR.
tim
Yup, tried it-- no luck; still cannot boot.
I found this:
Uh, fixed. Seems while installing Sierra it totally erased MBR partition
1. First created rescue CD with GParted Live CD or SystemRescueCd
2. Boot from this disk and rungdisk /dev/sdafrom terminal to create Hybryd partition - instructions under the link. In my case I converted 2nd Apple HFS+ and 4th Windows NTFS partitions to hybryd and set bootable flag to Windows’s one.
3. Reboot
4. Boot from Windows 7 installation DVD, select language and run System Recovery -Repair your computerlink, follow Windows instructions
5. Boot Windows as usual
Is this what I should do? Thanks!
If you disable SIP and in Winclone, make the Boot Camp partition legacy bootable, Winclone writes out a new MBR. You can see it by running this in Terminal:
fdisk /dev/disk0
tim
Here it is. What are we looking at?
That is showing a correct MBR for legacy booting (the * is showing partition 4 is flagged) and Windows is the last of the first 4 partitions. Does Windows shows an error message or any indication of why the boot error is?
tim
Have (may be) the same problem with W7 on a MacBookPro Retina from 2012.
_Use still W7 because I do not find for the Mac a software as good as CorelDraw x5 _
and I do to not want to upgrade to a higher version of Corel (and Windows).
The bootcamp partition of W7 is recognised. Microsoft starts and crashes with blue screen.
++++
The (my) Terminal does not find the command sudo fdisk /dev/disk0
2.
If legacy bootable is the solution.
How can I - with Winclone 6 - use that feature shown under Tools? The Tool is grey on the screen.
3.
As my Windows 7 Bootcamp (Winclone 6.2.2) runs on my MacBookPro 2010 i5,
is it then not already legacy bootable?
And the reason that it does not run on the newer MacBookPro 2012 i7 Retina is different?
4.
Checked with another program. Seems to be legacy bootable, but does crash.
