Bootcamp assistant fails to partition

Discussion in 'OS X Yosemite (10.10)' started by kiouv, Oct 23, 2014.

  1. kiouv macrumors newbie

    Joined:
    Oct 23, 2014
    #1
    Hello,

    I have a problem with my MBP 2014. I upgraded lastly for Yosemite.

    1. I want to install Windows with Bootcamp, but it fails to partition the disk. In Disk Utility, when I verify the Macintosh HD, it says I need to hold Cmd+R at startup to enter recovery mode, and then use Disk Utility.

    2. When I do so, I verify and repair the disk, and everything goes fine.

    3. When I try again in Normal mode, number 1 keeps happening.

    Do you see any solution ?

    Thank you
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
  3. kiouv thread starter macrumors newbie

    Joined:
    Oct 23, 2014
    #3
    235 Go free on 500 Go. I want 150Go for Windows.

    ----------

    I tried with 120 Go for Win, same failure.
     
  4. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #4
    The Yosemite install probably turned your disk into a core storage volume that cannot be resized.

    Disconnect any external drives then enter the command below in Terminal to revert the core storage then it should work.

    Code:
    diskutil cs revert /
     

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