Messed up EFI, late 2013 15" rMBP

[FinnPhone]

Hello,

The case is that my first windows 8.1 bootcamp installation failed, then i tried second time with these instructions:https://discussions.apple.com/message/23631556#23631556

and windows installation was successful. However now I have two windows entries in EFI like this:

In photo there is the "working" windows HD chosen, if i chose the right side windows HD computer just freezes. If i boot computer without keeping alt key pushed down the screen will just stay gray, not even Apple startup chime. With alt key I can boot to OSX or Windows and both work o.k.

From disk utility view everything looks o.k?

Any help is appreciated, just 3 days old computer and my first mac, I wouldn't like to do OSX re-install...

 

[blueroom]

How did you manage to mess up the EFI?

 

[FinnPhone]

How did you manage to mess up the EFI?

The failed windows 8.1 installation probably caused it, I thought i did everything like Apple bootcamp instructions told.

 

[DSpawnZ]

Hi. You can try EasyBCD under Windows (with extreme caution!).
Among other functions it has an EFI Table editor.
In advanced mode you can delete the non-working EFI entry,
probably Windows setup left it there.

Sorry for my english.

 

[FinnPhone]

Hi. You can try EasyBCD under Windows (with extreme caution!).
Among other functions it has an EFI Table editor.
In advanced mode you can delete the non-working EFI entry,
probably Windows setup left it there.

Sorry for my english.

De nada, english isn't either my native language. I try EasyBCD and report here what are the results.

 

[FinnPhone]

Hi. You can try EasyBCD under Windows (with extreme caution!).
Among other functions it has an EFI Table editor.
In advanced mode you can delete the non-working EFI entry,
probably Windows setup left it there.

Sorry for my english.

Well, I enabled expert mode in EasyBCD but still couldn't find EFI Table editor, is it only available at paid version of that program? I installed the free version.

 

[FinnPhone]

From system preferences I managed to change startup up disk to OSX and computer boots now as it supposed did also NVRAM/PRAM reset but windows extra entry still stays in EFI...

 

[DSpawnZ]

Please tell me what it shows in "Edit Boot Menu"

 

[FinnPhone]

Please tell me what it shows in "Edit Boot Menu"

Here's the view from boot menu

 

[jondunford]

putting windows in a mac is like putting diesel in a dodge viper

 

[DSpawnZ]

It seems there's no duplicated EFI entries.
What I think it might be hapenning is that Windows 8.1 creates a 350mb recovery partition at the end of the volume space.
The Mac EFI boot menu, might be "seeing" this partition as a Windows boot partition , so it shows you two instances, the primary big partition and the recovery partition.
If this is what is happening, you won't be able to delete it, because Windows 8.1 relies on that partition.

Regards.

 

[FinnPhone]

It seems there's no duplicated EFI entries.
What I think it might be hapenning is that Windows 8.1 creates a 350mb recovery partition at the end of the volume space.
The Mac EFI boot menu, might be "seeing" this partition as a Windows boot partition , so it shows you two instances, the primary big partition and the recovery partition.
If this is what is happening, you won't be able to delete it, because Windows 8.1 relies on that partition.

Regards.

Okay. Thanks for help, I made appointment for Apple phone support for next monday. There must be something wrong in my windows installation because I haven't seen reports from other users about this kind of problem, or current EFI version of this computer has serious issues regarding windows 8 installation. Just wondering if this would cause problems when installing parallels/wmwarefusion?

 

[FinnPhone]

putting windows in a mac is like putting diesel in a dodge viper

It might be so, but according Apple advertising these computers accept also "diesel". Nevertheless hands down this is best computer I have so far owned.