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Q: Not recognizing external hard drive

I have a 1 terabyte seagate external hard drive that I used to back up my PCs and tried to connect it to my Macbook Pro to transfer the files over from my old computers, but the Mac won't recognize the external hard drive at all. Any suggestions?

Macbook Pro 15" 2.66 ghz, Mac OS X (10.6.4)

Posted on Sep 5, 2010 1:58 PM

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Q: Not recognizing external hard drive

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  • by fmk040,

    fmk040 fmk040 Feb 20, 2014 12:21 PM in response to Weeblerock
    Level 1 (0 points)
    Feb 20, 2014 12:21 PM in response to Weeblerock

    I was having the same problem.  My MBP would not recognize my disk, and no image was mounted on my desktop.  I went into System preferences and noted that while the disk was recognized it was not 'available'.  I verified the disk through disk utility to no avail.  In the end I ended up having to delete my previous backups, and re-format the disk for use by Time Machine. 

     

    I am using a 2010 MacBook Pro hard drive scavenged from my old laptop, the logic board of which suffered water damage.

  • by angelaknew,Helpful

    angelaknew angelaknew Feb 27, 2014 11:41 PM in response to Weeblerock
    Level 1 (5 points)
    Feb 27, 2014 11:41 PM in response to Weeblerock

    http://www.seagate.com/support/external-hard-drives/portable-hard-drives/goflex/ ntfs-driver-for-mac-os-master-dl/

     

    go to the link and download the driver for seagate goflex harddrive users. i did this and finally my harddrive can be detected on mac.

  • by Lancefurr,

    Lancefurr Lancefurr Mar 12, 2014 11:04 PM in response to Weeblerock
    Level 1 (0 points)
    Mar 12, 2014 11:04 PM in response to Weeblerock

    I had a similar issue. I went into Disk Utilities -> Selected the HD -> and then clicked Verify Disk. Hope this helps

  • by Meerios,

    Meerios Meerios Mar 15, 2014 8:32 AM in response to Weeblerock
    Level 1 (0 points)
    Mar 15, 2014 8:32 AM in response to Weeblerock

    Someone please help -

     

    I have the latest macbook pro retina display running on 10.9.2

     

    My external hardrive just stopped being recognized today however when i go

     

    apple logo > about this mac> More info> System Report> USB  then im able to see it there

    but not able to do anything with it ???

     

    PLEASE HELP !!!1 STARTING TO HATE MACS now

  • by Mark Piaskiewicz1,

    Mark Piaskiewicz1 Mark Piaskiewicz1 Mar 15, 2014 8:51 AM in response to Meerios
    Level 3 (578 points)
    Notebooks
    Mar 15, 2014 8:51 AM in response to Meerios

    Have you tested the USB port with another device?

  • by Frenske2002,

    Frenske2002 Frenske2002 Mar 17, 2014 1:14 AM in response to Lancefurr
    Level 1 (0 points)
    Mar 17, 2014 1:14 AM in response to Lancefurr

    Activating the disk worked for me!

    After doing this, the Time Machin worked again

  • by atomicclock,

    atomicclock atomicclock Mar 21, 2014 7:07 PM in response to Weeblerock
    Level 1 (0 points)
    Mar 21, 2014 7:07 PM in response to Weeblerock

    About once a year my 2012 27" iMac decides not to recognise my Seagate external 2TB HDD. It doesn't even show up in Disk Utility. This always works to get it back again:

     

    1. Unplug external HDD from power and USB.

    2. Restart Mac.

    3. Plug HDD USB cable into Mac USB port.

    4. Turn HDD power on.

    5. Wait several anxious seconds.

    6. Success!

     

    It never works if you have the HDD already powered up when you plug it in to the Mac USB, so I suspect something to do with USB power is the issue.

  • by theodets,

    theodets theodets Apr 2, 2014 4:31 AM in response to angelaknew
    Level 1 (0 points)
    Apr 2, 2014 4:31 AM in response to angelaknew

    Good advice, was lucky to find your post so quikly

  • by balvolkan,

    balvolkan balvolkan Apr 10, 2014 11:25 AM in response to Weeblerock
    Level 1 (0 points)
    Apr 10, 2014 11:25 AM in response to Weeblerock

    Today I have realized that my ntfs 500 gb seagate goflex is no more recognized by my macbook pro 15 retina, but same drive was working with desktop PC under windows 7. Not even by disk utility!

     

    I read this support page until the end with no solutions.....

     

    what I did worked for me :

     

    go to web page seagate simply download mac driver for the seagate

     

    restart

     

    that is it.

     

    weird thing we have 2 15 retina macbook pros same ntfs WD disk is recognized by one of them and not one of them.

  • by kringle9,

    kringle9 kringle9 Apr 25, 2014 6:06 PM in response to Weeblerock
    Level 1 (0 points)
    Apr 25, 2014 6:06 PM in response to Weeblerock

    hey folks, there was some good information here however I still have a problem. When I go to plug in my hard drive, I go to Disk Utility and the hard drive is seen but the "repair" option is greyed out.

    I would be very greatful if anyone would give me some advice. And if I am able to fix the problem I will personally email you the lyircs to "Space Jam", the hit song by Quad City DJ's.

    thanks

  • by rdj,

    rdj rdj Apr 25, 2014 8:54 PM in response to kringle9
    Level 1 (15 points)
    Apr 25, 2014 8:54 PM in response to kringle9

    Unmount the volume, and the control should become active.

  • by Britain14,

    Britain14 Britain14 Apr 30, 2014 1:53 PM in response to Weeblerock
    Level 1 (0 points)
    Apr 30, 2014 1:53 PM in response to Weeblerock

    This helped me. My back up disk was not recognised after I have to reinstall Mevericks.

     

    I copied my data from external hard drive (EHD) which I used as time machine to a windows machine (manually) and connected EHD to mac. I erased the volume through disk utility and mac later recognised it.

     

    This means now I have move again my files from windows pc to EHD but saved me buying another disk.

  • by hells-bells,

    hells-bells hells-bells May 4, 2014 9:28 PM in response to Weeblerock
    Level 1 (0 points)
    May 4, 2014 9:28 PM in response to Weeblerock

    Similar problem here. My Seagate 1TB portable HDD was NTFS formatted and worked fine on my Windows PC, but my RMBP 2013 wouldn't recognise it. I reformatted it to exFAT - still no joy. Then the other day my partner tried it on his older Macbook Pro and was prompted to 'Verify' it, which he did, and formatted to Mac OS. I plugged it into my Mac and it worked, but with the 'Verify' popup again. I reformatted it again as exFAT so I can use it for both Mac and PC and it seemed to work fine on both Mac and PC yesterday. Copied files off PC today, plugged in to Mac - got the 'Verify' popup again! Unplugged and tried again, now I'm back to square one - drive isn't recognised by Mac but is by PC. What the **** is going on??!! Is this a Mac issue or a problem with the HDD?

  • by PlotinusVeritas,

    PlotinusVeritas PlotinusVeritas May 4, 2014 10:37 PM in response to hells-bells
    Level 6 (14,806 points)
    May 4, 2014 10:37 PM in response to hells-bells

     

    hells-bells wrote:

     

    but is by PC. What the **** is going on??!! Is this a Mac issue or a problem with the HDD?

     

    What were you thinking again?         You formatted the same HD a dozen times and now youre complaining about it not working between PC and Mac?

     

    Keep it simple, ok.

     

    buy a few HD, they're cheap as dirt.

     

    Keep a couple for your Mac, formatted in Mac OSX, and keep it that way.

     

    Keep another formatted in Exfat for both PC and Mac transfers.....and keep it that way.

  • by hells-bells,

    hells-bells hells-bells May 4, 2014 10:48 PM in response to PlotinusVeritas
    Level 1 (0 points)
    May 4, 2014 10:48 PM in response to PlotinusVeritas

    Seriously? That's your advice?? This HDD has NEVER worked properly with my Mac - long before multiple (but far from "a dozen") re-formats. Would be great to know if it's a Mac issue or a Seagate issue, so I can either raise the problem with Apple or take the HDD back for a refund.

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