Can't reboot to Mac OS X from Win 8.1

Discussion in 'Windows, Linux & Others on the Mac' started by Selico, Mar 7, 2014.

  1. Selico macrumors newbie

    Joined:
    Mar 7, 2014
    #1
    I can't reboot to Mac OSX from Windows 8.1. I've tried the options below and they're not working:

    • Holding down alt/option on startup
    • Holding down Command + R on startup

    Upon trying these options, the computer still starts up in the Windows partition.

    Unfortunately, I didn't install Bootcamp 5 before updating Windows 8 to 8.1. In addition, Bootcamp 4 is having compatibility issues on the Windows partition and everytime I click on "Run the program without getting help" it crashes/shuts down my computer.

    So I tried re-installing Bootcamp 5 and it's telling me I can't do it unless I have Windows 7?

    So am I stuck in Windows? Please help.
     
  2. xcodeSyn macrumors 6502a

    Joined:
    Nov 25, 2012
    #2
    Do a NVRAM (PRAM) reset while starting up, Command + Option + P + R, and it'll reset your default starup to OS X.
     
  3. Selico thread starter macrumors newbie

    Joined:
    Mar 7, 2014
    #3
    Just tried that a couple times. It's still not working. :\ Is there a specific time I'm supposed to press the buttons? I tried doing it right after pressing the power button and holding it, then I also tried it after I hear the mac startup noise.
     
  4. Lipid macrumors member

    Joined:
    Jan 28, 2014
    #4
    Are your MacOS and Recovery partitions healthy and not corrupted?

    Try to hold CMD+OPT+R to launch Internet Recovery during system boot.
     
  5. Selico thread starter macrumors newbie

    Joined:
    Mar 7, 2014
    #5
    Tried that as well and it didn't work either. :\
     
  6. xcodeSyn macrumors 6502a

    Joined:
    Nov 25, 2012
    #6
    Follow the instructions here, need to click on the tab of Resetting NVRAM/PRAM.

     
  7. Selico thread starter macrumors newbie

    Joined:
    Mar 7, 2014
    #7
    I'm afraid this didn't work either... I don't think any keyboard combination's going to work. Is there anyway to get bootcamp 5 on here? It keeps telling me I need Windows 7 installed to run the bootcamp 5 downloader...
     
  8. jenzjen macrumors 68000

    Joined:
    Aug 20, 2010
    #8
    Back up a little, though. You're no longer able to get into OSX at all? I assume you'd like to get OSX back so the only quick option is to do internet recovery - which may mess up your Windows partition. But since your Windows seems buggy, too, I'd just clean install everything.

    Try this when booting the machine - hold down 'command' and 'R' - you should get into internet recovery, see a spinning globe
     
  9. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #9
    I agree, but not every Mac supports the internet recovery.
    It will help if you can tell us exactly which Mac model you have.

    Here's a possible work-around to get the keyboard boot keys to work:
    reset PRAM again. (restart holding Alt-command-P-R)
    You should hear the boot chime. Keep holding the same 4 keys until you hear the boot chime 2 more times, then - while the chime is still sounding, release the keys, and hold Command-R
    Important! if your keyboard is NOT a Mac keyboard, it will have a Windows key instead of a command key - and you would hold the Windows key + R

    When you are booted to the recovery partition, you can check the hard drive in Disk Utility, and you can also set the boot drive in the Startup Disk pane, under the Utilities menu. Or, choosing to Quit the Recovery partition will give you the choice to choose, or change the startup disk.
    If you still can't get there - or that you discover that the OS X partition is simply gone, you have messed it up very well, AND you really do have to reformat and start over from a blank drive.
     
  10. Selico, Mar 8, 2014
    Last edited: Mar 8, 2014

    Selico thread starter macrumors newbie

    Joined:
    Mar 7, 2014
    #10
    The keyboard on startup things are still not working. I think we can officially rule out all of those.

    How would I backup/restore to before Windows 8.1?

    EDIT: My computer is a 15" MacBook Pro. I think I got it around 2011? I can't exactly check since I can't access my Mac OS. I've put some of the details below if it helps any:

    Processor: Intel($) Core(TM) i7-2720QM CPU @ 2.20 GHz
    RAM: 4 GB
    OS: 64-bit OS Windows 8.1
     
  11. xcodeSyn macrumors 6502a

    Joined:
    Nov 25, 2012
    #11
    Since keyboard control is essential for you to get back to OS X or any recovery attempt, can you attach an external USB keyboard and do what DeltaMac suggests?
     
  12. KdParker macrumors 601

    KdParker

    Joined:
    Oct 1, 2010
    Location:
    Everywhere
    #12
    you should be able to boot up OSX from windows...

    Right-click the Boot Camp icon in the notification area at the right side of your Windows taskbar — it looks like a slanted square — and choose Restart in Mac OS X. Again, you’ll be asked to confirm your choice. After you click OK
     

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