OS X 10.8.5 can't set permissions for external hard drive.

Discussion in 'macOS' started by frnc, Feb 14, 2014.

  1. frnc macrumors newbie

    Feb 14, 2014
    Under Sharing & Permissions there's only "You can only read". No other options available. No lock either.

    Any ideas?

  2. simsaladimbamba

    Nov 28, 2010
    What format does the external drive use? It is listed under FORMAT.

  3. DeltaMac macrumors G3


    Jul 30, 2003
    What format is the external hard drive?
    You can right-click on the hard drive, and choose Get Info.
    If the format is NTFS, then that will be read-only on a Mac.

    You can either re-format that drive as a MacOS Extended format (which will erase the hard drive completely) or you could also download and install one of the NTFS drivers, such as from Tuxera.
  4. Barney63 macrumors 6502a


    Jan 9, 2014
    Bolton, UK.
    Is there no similar program to AOMEI that can be used?
    AOMEI can convert NTFS>FAT32 and FAT32>NTFS without losing data.

  5. frnc thread starter macrumors newbie

    Feb 14, 2014
    Ok, the external drive is actually NTFS formatted. I deleted all files on it anyway, so no worries about loss of data. How can I reformat it to... HFS?

    Ideally I would like to use the ext drive both for MAC and PC.

    Attached Files:

  6. DeltaMac macrumors G3


    Jul 30, 2003
    You can do that easily on your Mac.
    Launch Disk Utility.
    Choose that external drive (not the Elements partition line, but the line directly above it with the manufacturer's info.)
    Click the Partitions tab.
    Click the drop down under Partition Layout.
    Change to 1 Partition (or more, your choice)
    Format should show Mac OS Extended (journaled)
    Name your partition, if you like.
    Click the Options button, near the bottom of the window, and change to GUID, and click OK.
    Click the Apply button. And, wait for a few seconds, and your drive is fully usable on your Mac (and NOT fully usable on Windows. If you need Windows, too, then there's other solutions for that, too)
  7. maflynn Moderator


    Staff Member

    May 3, 2009
    OSX cannot set permissions on NTFS. If you're going to use this for both then I'd recommend using exFAT as the format. You can avoid buying applications to give Windows the ability to read/write HFS+ partitions and conversely if you go with the NTFS format you can avoid buying a utility to give OSX the ability to write to NTFS volumes.
  8. frnc thread starter macrumors newbie

    Feb 14, 2014
    Thanks Everybody.
    I appreciate your help.
    I have used ExFAT as format to use the drive for both MAC and Windows.
    The drive does work on my MAC now, but not on my Windows machine (...). I tried to select in Options both GUID and later Master Boot, but this didn't seem to help. My PC still tells me that the drive is not formatted. And it shows only NTFS as possible format (hence not possible to format it as ExFAT from my Windows). Could it be because my PC, to use an euphemism, is not the newest one on the market?
  9. chown33 macrumors 604

    Aug 9, 2009
    ExFAT is a software capability. The hardware has no direct relevance.

    What version of Windows are you using?
    ... It is supported in Windows XP and Windows Server 2003 with update KB955704,[2] Windows Embedded CE 6.0, Windows Vista with Service Pack 1,[4] Windows Server 2008,[5] Windows 7, Windows 8, Windows Server 2008 R2 (except Windows Server 2008 Server Core), Mac OS X Snow Leopard starting from 10.6.5,[6] Mac OS X Lion, OS X Mountain Lion, and OS X Mavericks.​
  10. frnc thread starter macrumors newbie

    Feb 14, 2014
    I am using Windows XP (2002).
  11. DeltaMac macrumors G3


    Jul 30, 2003
  12. frnc thread starter macrumors newbie

    Feb 14, 2014
  13. Kon Iatrou macrumors newbie

    Kon Iatrou

    Mar 5, 2017
    This is brilliant! Saved the day big time. Has the same exact problem. The fix is in the padlock on the bottom right hand corner. Clicked on it and I changed the Read only permission to Read and Write and then applied the changes to the whole drive using the gear icon and selecting "Apply to enclosed items ...". Then the whole drive was once again accessible.

    Thanks to all assisted :)

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