OS X keeps shutting down after installing windows 8.1

Discussion in 'OS X Mavericks (10.9)' started by trynix, Jun 8, 2014.

  1. trynix macrumors newbie

    Aug 25, 2008
    Hello everyone.

    Earlier today I finished installing windows 8.1 through bootcamp - all nice and well.

    Once I finished installing the bootcamp drivers, I wanted to restart back to OS X to no avail!

    Every time I restart into OS X, the apple logo shows up, then the grey update bar appears below the logo. It takes 5 seconds for the first 5% of the bar to darken, then the bar disappears.

    A few seconds later, my iMac shuts down.

    I am posting this message through the windows 8.1 partition, and as far as I can tell I have access to all my OS X files and folders.

    Any idea what caused this and how it can be rectified?

    PS: I've tried the PRAM/NVRAM reset, but that didn't do much.
  2. chrfr macrumors 604

    Jul 11, 2009
    This is indicating that there's disk corruption that the OS is trying to repair but can't. Start up into the Recovery Partition (hold down command-R as you start the computer) and select Disk Utility. Select your disk on the left side of the window and Select First Aid and "Repair disk" (not repair disk permissions) on the right side of the window.
  3. trynix, Jun 8, 2014
    Last edited: Jun 8, 2014

    trynix thread starter macrumors newbie

    Aug 25, 2008
    I just tried that and received the following:
    - If I select the drive, I receive the message "live file system repair is not supported"
    - If I select the OS X partition, I receive a message that states I must backup my data and re-install Maverick

    So I guess I just need to download Maverick, burn it to a CD and install it ontop of my current partition? (I tried re-installing through recovery but it stated that the OS X partition is locked).

    EDIT: Where/how can I obtain a Mavericks bootable ISO from..
  4. chrfr macrumors 604

    Jul 11, 2009
    You'd need to reformat that partition. Installing over the top of what's there won't solve the corruption. If everything is backed up you could reformat from recovery and then reinstall via the internet. If your data is not entirely backed up I would get an external USB disk and install the OS on it, then start up from that disk and copy as much of your data off as you can.
    Alternatively, DiskWarrior by Alsoft is an extremely powerful disk repair tool which may be able to repair your corrupt disk without having to reformat.
  5. FreakinEurekan macrumors 68040


    Sep 8, 2011
    Eureka Springs, Arkansas
    Sounds like the Mac partition got corrupted when it was resized during the Boot Camp setup. I would suggest the Nuclear Option -
    • boot into Recovery
    • repartition the disk (wipe clean)
    • install OS X from Internet Recovery
    • update to Mavericks (clean install, no data yet)
    • Install Boot Camp / Windows
    • Last, migrate your data from Time Machine using Migration Assistant (not a "restore")
  6. jlsm511 macrumors 6502


    Feb 26, 2008
    If you can still access the Mac partition through windows I would also back up any critical files before reinstalling OS X.

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