Deleted bootcamp partition, now Mac won't boot.

Discussion in 'Mac Basics and Help' started by Qwerty11, Dec 30, 2015.

  1. Qwerty11 macrumors regular

    Sep 1, 2010
    I decided I no longer wanted the Bootcamp partition I created so, using DiskUtility, I deleted it. I then restarted the computer, selected to install the updates, and the computer froze. I did a hard restart, was treated by the apple logo and the boot bar. The boot bar progressed to 3/4 of the way and the computer shut down. I booted into recovers and ran first aid on the device; everything came back OK. Any ideas?
  2. Meister Suspended


    Oct 10, 2013
    First boot into recovery (

    Click the Apple menu on the bar at the top of your screen and select Startup Disk to access the Choose Startup Disk tool. Use this tool to choose the Macintosh HD as target startup disk.

    If this doesn't work:
    Did you use an app like reFit to install the other OS? That can complicate things.
  3. Qwerty11 thread starter macrumors regular

    Sep 1, 2010
    I thought the same thing, but it still did not. boot.

    I didn't use anything special to build the bootcamp.

    Any other advice?
  4. ApfelKuchen macrumors 68030

    Aug 28, 2012
    Between the coasts
    Deleting the partition via Disk Utility can create issues, especially in terms of recovering the disk space - ought to have deleted it using Bootcamp Assistant. You may need to erase/reinstall. Got a backup?
  5. Erdbeertorte Suspended

    May 20, 2015
  6. Qwerty11 thread starter macrumors regular

    Sep 1, 2010
    I did try resetting the NVRAM.

    Any other options? I do have a backup, but would rather recover.
  7. Erdbeertorte Suspended

    May 20, 2015
    Did you run First Aid on the whole drive too or just on the "Macintosh HD" or whatever it is called volume? If not do that at first.

    What happens when you try to partition the drive? Can you enlarge the OS X volume to the full drive or create a second partition?

    I don't know if it makes any sense, but just try also the SMC reset:

    What volumes do you see in the boot menu, when you hold the option/alt key on startup?

    You could also try to boot OS X in safe mode with holding shift. Maybe it works and boots normally again after shutting down.

    If nothing works, try to install OS X again from the Recovery Partition. If that doesn't work too, delete and repartition the whole drive and restore your backup.
  8. olli321 macrumors newbie


    Feb 17, 2016
    I have a huge problem after installing rEFIt.

    After i used the installer and restarted my Mac 10.9.5 wont start again.

    Even when I insert a usb drive with the Mac installation on it in order to change the start up option and delete the EFI folder, Mac Os wasnt starting [​IMG]

    I unscrewed my Mac to get to the hard drive myself, deleted the folders and again nothing. Still Mac does not start.

    In sindel user mode the bless command wont work cause of read only setting.

    Same is for diskutil and others.

    I also did this COMMMAND ALT P an R in order to reset the NVRAM. But nothing.

    I am in pure despair. Is there really Nothing to do?
  9. tjwilliams25 macrumors 6502

    Aug 10, 2014
    Which Mac do you have? Does it have a Fusion Drive in it? If that's the case, you'll have to rebuild the logical storage group, which will completely wipe both of your drives. Because of the special way the Fusion Drive is handled, Bootcamp is the only way to safely uninstall the Bootcamp Partition. I had the exact same problem when trying to install Windows 10 on my 5k iMac.
  10. DeltaMac macrumors G3


    Jul 30, 2003
    Yes, a fusion drive will certainly give you issues if you delete some other bootable partition (the Windows one!).
    If not a fusion drive, then quickest way to get your OS X going again will be to reinstall OS X.
    If you have a bootabie installer, use that.
    If not, boot to your recovery system, and choose to reinstall.
    All of your own files, apps, and you documents, pictures, etc, should not be affected, but your OS X system will simply be reinstalled, which should get you booting again.

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