Resolved Couldn't modify partition map

Discussion in 'OS X Mavericks (10.9)' started by timsaxman, Jul 25, 2014.

  1. timsaxman, Jul 25, 2014
    Last edited: Jul 25, 2014

    timsaxman macrumors member

    Joined:
    Feb 13, 2013
    #1
    Hi

    I am currently trying to install Yosemite and I wanted to partition my Macintosh HD but I get the error:

    "Partition failed with error:

    Couldn't modify partition map because file system verification failed."

    I have a 512 GB disk with 120 GB dedicated to Bootcamp and the rest is Macintosh HD at the moment.

    Is it Bootcamp that is causing the problem or is it something else? Is there an easy solution?

    Edit: I have a 2013 13" rMBP running Mavericks.
     
  2. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #2
    Try a command-r boot to recovery and from there launch Disk Utility and do a repair disk. Does that show the error fixed?
     
  3. timsaxman thread starter macrumors member

    Joined:
    Feb 13, 2013
    #3
    Yes this solved it. Thank you!
     
  4. elgazzar macrumors newbie

    Joined:
    Mar 22, 2011
    #4
    Brilliant!

    Thank you sooooo much! This was very helpful, and it worked on my external drive as well!

    Thanks to both of you :)

    Tawfik
     
  5. JC Fire macrumors newbie

    Joined:
    Sep 17, 2014
    #5
    I Tried this and it dosen't work

    :mad::mad::mad::mad::mad::mad::mad::mad:
     
  6. valadas macrumors newbie

    Joined:
    Feb 27, 2015
    #6
    Fixed

    If it may help anyone else, I just noticed that you can repair the whole disk or individual partitions. At first it did not do anything when repairing the disk (it said it was fine), then I repaired the partition and there was many things to fix.

    Finaly I resized my partition normally.
     
  7. Mac Hammer Fan macrumors 6502a

    Mac Hammer Fan

    Joined:
    Jul 13, 2004
    Location:
    Belgium
    #8
    Many many thanks Weaselboy. You solved my problem that OWC couldn't do! They told me that my Accelsior PCI SSD was defective in case that PRAM and SMC reset didn't work. I appreciate your advice very much!
    :)
     
  8. Ali262 macrumors newbie

    Ali262

    Joined:
    Oct 4, 2017
    #9
    Sir, I have macbook pro and I installed Windows 10 on it the IOS was deleted a year ago but now I want to reinstall IOS so I used the command+r to set internet recovery mode but I could format my hard it say could modify partition map ...and command+r isn't working it says no operating system found
     
  9. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #10
    Are you seeing the spinning globe before you enter recovery? If you are in Internet recovery you will see that globe.

    If you are, in the Utilities menu, open Terminal and run the command below and tell me what it says.

    Code:
    diskutil list
     
  10. Ali262 macrumors newbie

    Ali262

    Joined:
    Oct 4, 2017
    #11
     
  11. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #12
    I see a blank reply from you there. Did you mean to post something?
     

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