External HD Issues

Discussion in 'MacBook Air' started by plactice, Oct 17, 2016.

  1. plactice macrumors newbie

    plactice

    Joined:
    Oct 17, 2016
    #1
    Hi guys,

    I've updated to Sierra when it came out and for some reason, my external HD is no longer useable.

    I am using the 2014 Macbook Air and prior to updating, i had never any issues with using an external HD.

    I have tried plugging that HD into my PC to make sure that the HD isn't the problem and it works there without any issues. I have also reseted my macbook's PRAM/SMC but it doesn't help. I have tried to manually mount the external via Disk Utility but it is just greyed out and unable to do anything else. I have reformatted the specific HD as well but doesn't work :(

    I have also tried plugging a separate HD into my mac and it works just fine, just this specific HD won't connect at all.

    Any help is appreciated,

    Jason
     
  2. plactice thread starter macrumors newbie

    plactice

    Joined:
    Oct 17, 2016
  3. plactice thread starter macrumors newbie

    plactice

    Joined:
    Oct 17, 2016
    #4
  4. chabig macrumors 68040

    Joined:
    Sep 6, 2002
    #5
    This is a clue. A Mac formatted hard drive shouldn't work on a PC. What else didn't you tell us about your hard drive?
     
  5. Floris macrumors 68020

    Floris

    Joined:
    Sep 7, 2007
    Location:
    Netherlands
    #6
    When it is greyed out, from the menu bar > file > is there unlock or mount as option?
     
  6. plactice thread starter macrumors newbie

    plactice

    Joined:
    Oct 17, 2016
    #7
    like i said, prior to updating to sierra it worked perfectly fine. I'm not sure what else I've missed out - please do let me know if i can provide any other information ..

    mount is available, i can click it but it doesn't do anything - just remains idle
     
  7. Floris macrumors 68020

    Floris

    Joined:
    Sep 7, 2007
    Location:
    Netherlands
    #8
    Sometimes it shows like it's not updating in disk utility, but the drive does appear on the Desktop.
    Sorry if it doesn't have an effect on your drive.
     
  8. HDFan macrumors 6502

    Joined:
    Jun 30, 2007
    #9
    1. What type of HD is it? Firewire, USB2, USB3, USB-C, lightning .... ?
    2. What size?
    3. You said that it wouldn't mount, but your were able to format it. Where did you format it, on the PC or on the MAC?
    4. If on the Mac then how did you format it? OS X Extended (Journaled), Case sensitive, MS DOS, MS Dos FAT ...
    5. What kind of partition table did you use (GUID, Master Boot, Apple Partition)?
    6. Same questions as 4,5 if you formatted on the PC
     

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