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Topic # 115422 25-Mar-2013 17:45
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I've happily had a dual boot between Windows 7 and OS X (Hac) set up on my machine for several months. Today I decided to try out Windows 8, having heard good things once you disable Metro by using Start8.

I have OS X on the first hard drive, and it boots by default. To get into Windows 7 I press F12 at the POST beep and then select the second drive.

For the 8 installation, I first physically disconnected the OS X drive (to ensure that the installer didn't overwrite the Chimaera loader required for OS X), then booted from the Windows DVD and proceeded as usual (clean install, not an upgrade). My troubles began after it was all installed and I reconnected the first drive. Windows 8 seems to have hijacked the boot sequence. The system now boots into Windows 8 instead of OS X. Even if I go into the EFI and ensure that my OS X drive is set as the first device in the boot order, it still boots into Windows 8. I can use F12 and manually select the correct drive, which works, but at next reboot it's back into Windows again.

How is this possible? I'm new to EFI but it appears that Windows is somehow overriding my selections, which seems like it shouldn't be possible; I would have thought that my own options would override anything provided by the software vendor.

Can anyone please explain what's going on here? In the meantime I've had to disconnect the Win 8 drive so that it doesn't automatically boot into it.

This looks like an uphill battle because Start8 didn't want to run either, but one thing at a time...

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  Reply # 786821 25-Mar-2013 18:01
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What did you use for the dual boot? I used bootcamp on my MacBook air for OSX and Win8 and had the same issue, so went into the bootcamp utility in the Control panel of windows, and set default OS to OSX. I assume you can select default drive in Windows anyway using startup options (?) and set it back to the old drive? Do that in OSX and windows.

Hopefully that helps, just what I've done in the past.




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Late 2013 MacBook Pro with Retina Display (4GB/2.4GHz i5/128GB SSD) - HP DV6 (8GB/2.8GHz i7/120GB SSD + 750GB HDD)
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  Reply # 786825 25-Mar-2013 18:07
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I'm not "using" anything for the dual boot; I installed each OS with only the one drive connected, and I just used to use F12 at boot to swap between them. Boot Camp, and the Startup Disk preference pane, are only usable on Apple hardware.

"Hac" in my first line is short for "Hackintosh"; running OS X on a generic PC.

Edit: The fact that I have OS X on the other drive is, as far as I know, completely irrelevant; it could be Linux or even Windows XP on there and I'm pretty sure that I'd be having the same issue.

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  Reply # 786831 25-Mar-2013 18:20
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Behodar: I'm not "using" anything for the dual boot; I installed each OS with only the one drive connected, and I just used to use F12 at boot to swap between them. Boot Camp, and the Startup Disk preference pane, are only usable on Apple hardware.

"Hac" in my first line is short for "Hackintosh"; running OS X on a generic PC.

Edit: The fact that I have OS X on the other drive is, as far as I know, completely irrelevant; it could be Linux or even Windows XP on there and I'm pretty sure that I'd be having the same issue.



Ahh I see, wasnt sure what that was meant to be sorry. 

http://www.partitionwizard.com/free-partition-manager.html

Ive used that in the past and it's been quite helpful. Not used it for a while though. The help section says its compatible with windows 8 so just have a look around the program maybe and see if you can fix it with that?




Bachelor of Computing Systems (2015)

 

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Late 2013 MacBook Pro with Retina Display (4GB/2.4GHz i5/128GB SSD) - HP DV6 (8GB/2.8GHz i7/120GB SSD + 750GB HDD)
iPhone 6S + (64GB/Gold/Vodafone NZ) - Xperia Z C6603 (16GB/White/Spark NZ)

Sam, Auckland 




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  Reply # 789302 29-Mar-2013 16:16
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I've had some more time to look into this and I finally have it working. Everything's done in the BIOS; there's no partitioning required.

With only the OS X drive connected, I first set all the "Boot Option" slots to Disabled. I then went into "Hard Drive BBS Priorities" and selected the drive in there. This added a new option to the Boot Option slots called "P0: OCZ-AGILITY3" (this is in addition to "UEFI: OCZ-AGILITY3" which I previously had set). After changing Boot Option #1 to the new "P0" device, I was able to reconnect the Windows 8 drive and the system happily boots into OS X like it should.

I can still use F12 to manually boot into Windows 8, which is what I wanted in the first place. Mission eventually accomplished :)

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