External hard drive on read only

Discussion in 'MacBook Pro' started by Abu Rayane, Oct 4, 2014.

  1. Abu Rayane macrumors member

    Joined:
    Sep 23, 2014
    #1
    Hello everybody,

    I would like to use my external HD and it is on read only, how can I change it from the terminal and desktop as well, I then found my Macintosh HD as well on read only
     
  2. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #2
    Sounds like you are logged in maybe using a guest account with no write permission to the external?

    OSX needs to write to the boot drive all the time, it isn't possible for the whole drive to be read-only.
     
  3. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

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    Denmark
  4. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    Most likely it's in NTFS format, you may need some 3rd party software like FUSE to make you ext HDD writeable under OSX.
     
  5. Abu Rayane, Oct 4, 2014
    Last edited: Oct 4, 2014

    Abu Rayane thread starter macrumors member

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    Sep 23, 2014
    #5
    I am using the admin account.

    Format type for external HD is: NTFS
     
  6. Abu Rayane thread starter macrumors member

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    Sep 23, 2014
  7. Abu Rayane thread starter macrumors member

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    Sep 23, 2014
    #7
    I installed it, but no idea how to perform
     
  8. Abu Rayane thread starter macrumors member

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    Sep 23, 2014
    #8
    Is there anyway to change the format type without formatting the HD?
     
  9. yjchua95 macrumors 604

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    GVA, KUL, MEL (current), ZQN
    #9
    Nope.
     
  10. Abu Rayane thread starter macrumors member

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    Sep 23, 2014
    #10
    So I should copy items from that external HD, format it then I can use it.

    Which format type is recommended to use in both sides (MAC and PC)?
     
  11. poiihy macrumors 68020

    poiihy

    Joined:
    Aug 22, 2014
    #11
    ExFat
    It works with Windows 7 but not Windows XP
    If you want to use with Windows XP you need to use FAT32 (MS-DOS FAT) but this has limitations and is not good for 2TB volume.

    This is for a partition itself, not for partition system...
    I do not know the partition formats available
     
  12. yjchua95 macrumors 604

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    GVA, KUL, MEL (current), ZQN
    #12
    ExFAT.

    Older Windows OSes have trouble with this format, but Windows 8/81 have absolutely zero problems with it.
     
  13. simonsi macrumors 601

    simonsi

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    Jan 3, 2014
    Location:
    Auckland
    #13
    OK, so the external is sorted, what makes you think the Macintosh HD is also read-only?
     
  14. Abu Rayane thread starter macrumors member

    Joined:
    Sep 23, 2014
    #14
    I have windows Vista, and 2TB external drive, so formatting in FAT will not be the good choice.

    Regarding the Macintosh HD, is only one folder inside it which is on read only
     

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