External HD read only after installing yosemite

Discussion in 'OS X Yosemite (10.10)' started by AriGold, May 11, 2015.

  1. AriGold macrumors member

    Joined:
    Oct 13, 2010
    #1
    After doing a fresh install of yosemite on my MBP, my external hard drive is now 'read only' and cannot copy files to it.

    Any ideas on what has changed and what I can do to fix the problem. I cannot format the drive as all my files are on it.
     
  2. dZp macrumors 6502a

    dZp

    Joined:
    Mar 29, 2006
    #2
    • Select the disk and choose File > Get Info.
    • Click the disclosure triangle next to Sharing & Permissions to expand that section.
    • Select the “Ignore ownership on this volume” checkbox.
     
  3. AriGold thread starter macrumors member

    Joined:
    Oct 13, 2010
    #3
    It says 'You can only read' only.

    There are no other options etc.
     
  4. dZp macrumors 6502a

    dZp

    Joined:
    Mar 29, 2006
    #4
    Can't you change the "Privilege" to "Read & Write" for yourself?
     
  5. AriGold thread starter macrumors member

    Joined:
    Oct 13, 2010
    #5
    No. It just says what i posted above. permissions in disk utility are greyed out also.
     
  6. jbarley macrumors 68030

    jbarley

    Joined:
    Jul 1, 2006
    Location:
    Vancouver Island
    #6
    Is the little 'Padlock' in the Get-Info window closed or open?
     
  7. AriGold thread starter macrumors member

    Joined:
    Oct 13, 2010
  8. chown33 macrumors 604

    Joined:
    Aug 9, 2009
    #8
    It's read-only because the disk format is NTFS. You can see this in the Format item under the General heading: "Windows NT File System (NTFS)"

    OS X can read NTFS by default, but not write it.

    "What changed" is that you had an extension that provided read/write capability, and that extension doesn't work in Yosemite, or it was removed by your fresh install.

    There are several different products that provide this capability. We can only guess which one you used.
     
  9. AriGold thread starter macrumors member

    Joined:
    Oct 13, 2010
    #9
    Ok thanks. I honestly don't remember if I had something installed which allowed me to read/write. Is there a common one I could try?

    I will have a research and see if I can find something.
     
  10. jbarley macrumors 68030

    jbarley

    Joined:
    Jul 1, 2006
    Location:
    Vancouver Island
    #10
    According to the reviews, this one appears to work with Yosemite.
     

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