Resolved Unable to install Windows 8 on iMac 2012

Discussion in 'Windows, Linux & Others on the Mac' started by mac.rumors, Feb 8, 2013.

  1. mac.rumors, Feb 8, 2013
    Last edited: Feb 9, 2013

    mac.rumors macrumors regular

    Joined:
    May 9, 2008
    Location:
    New York, NY
    #1
    Hello everyone!

    I replaced the HDD in my late-2012 iMac 27-inch (1TB Fusion drive) with a 512GB Samsung 830 SSD. Before replacing the HDD, I had split the fusion drive and installed Windows 8 on the 128GB Apple SSD.

    After the replacement, the Windows drive will not boot, so I reformatted it. I am able to see both drives in disk utility. I installed ML on the Samsung SSD, and ran Bootcamp. However, the Windows installer is not able to install on the 128 GB SSD, the error being that it is not a bootable drive and to change it in the BIOS.

    Any help/advise is greatly appreciated. My plan is to have Windows 8 on the 128GB Apple SSD and ML on the 512GB Samsung 830.

    Thanks!
     
  2. tevion5 macrumors 68000

    tevion5

    Joined:
    Jul 12, 2011
    Location:
    Ireland
    #2
    Even if you got it to boot it would be a nightmare to use I'm afraid as Apple have yet to release drivers for Windows 8. :(

    You will have to use Windows 7 if you want the drivers to be functioning properly and the system to anyway stable.
     
  3. jenzjen macrumors 68000

    Joined:
    Aug 20, 2010
    #3
    Not true re W8, the latest W7 drivers via boot camp assistant make everything work and stable, at least on a rMBP

    OP, am confused by your error, can you post a screen shot
     
  4. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #4
    You may need to either install on the other SSD or swap the 2 SSD positions in the iMac if possible.
    For instance, the 2012 non-retina Macbook Pro needs to have Windows installed on the disk in the original position in order for it to boot. It can't boot from a disk installed into the DVD drive bay.
     
  5. mac.rumors thread starter macrumors regular

    Joined:
    May 9, 2008
    Location:
    New York, NY
    #5
    Thanks for your inputs, everyone. I installed Windows 7 and the installer completed setup without any issues. Once everything was working fine, I wiped the Apple SSD clean again and was able to install Windows 8 without any further issues.

    Looks like the HDD replacement somehow 'locked up' the Apple SSD. But all is good now :)

    ----------

    I wanted the larger 512GB Samsung SSD for OS X and the smaller 128GB Apple for Windows 8. Also, swapping the SSDs is not be possible in the new iMacs because the Apple SSD is a blade SSD, similar to the ones in rMBP, while the replacement Samsung SSD uses a standard SATA III interface.

    Thanks!

    ----------

    You're correct, Windows8 installs without any problems with the Win7 bootcamp drivers.

    I couldn't get a screenshot of the error, but it said something to the effect that the Apple SSD partition could not be used for installing Win8 because it was not a bootable device and it needed to be enabled in the BIOS. I had confirmed that the drive's partition scheme was setup for MBR (I used the Bootcamp utility to set it up).

    Thanks!
     
  6. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #6
    That's most likely the problem. Repartition as GUID. Bootcamp does what is necessary to make the drive boot Windows.
     
  7. : z : macrumors newbie

    Joined:
    Feb 27, 2013
    #7
    mac.rumors:

    Do you know of a good step-by-step, detailed walk-through that I could use to break the Fusion drive and install Windows (7 or 8, I don't care) on the default iMac SSD? The only quirk is that I'm looking at buying the 3TB model. I think it would be the same thing that you did, only I would need to partition the 3TB drive into two partitions: a 2TB one and a 1TB one.

    I have a longer post over on the Apple forums with more details, but no one has been able to help me so far.
    https://discussions.apple.com/message/21037489#21037489

    Thanks!
     

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