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Not recognizing external hard drive

238682 Views 113 Replies Latest reply: Apr 10, 2014 11:25 AM by balvolkan RSS
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Weeblerock Level 1 Level 1 (0 points)
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Sep 5, 2010 1:58 PM
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)
  • JasonFear Level 5 Level 5 (4,935 points)
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    Sep 5, 2010 3:30 PM (in response to Weeblerock)
    Hi Weeblerock,

    When you say that the computer is not recognizing the HD, where is not seeing the drive? In Finder, in Disk Utility or in System Profiler? Based on how the drive was formatted on the PC there's a good chance you'll need to completely wipe and partition the drive in order to use the external HD.
    13" MacBook Pro (2.4GHz/4GB/250), Mac OS X (10.6.4)
  • JasonFear Level 5 Level 5 (4,935 points)
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    Sep 6, 2010 2:15 AM (in response to Weeblerock)
    Weeblerock wrote:
    It wasn't being recognized in Finder or in System Profile.


    Hi Weeblerock,

    Are you sure it's not being recognized in System Profiler? Because that's a whole other bag of issues. By System Profiler I'm referring if you go Apple Logo > About This Mac > More Info and then select the bus that the drive is connected via to your computer. Which is most likely USB.

    Disk Utility, an application within the Utilities folder is something completely different. If it sees it there and it's not a mount point then it's an NTFS / OS X file format issue. Macs can read from NTFS volumes but I'm not aware of a method to write to an NTFS volume.
    13" MacBook Pro (2.4GHz/4GB/250), Mac OS X (10.6.4)
  • JasonFear Level 5 Level 5 (4,935 points)
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    Sep 6, 2010 4:57 PM (in response to Weeblerock)
    Hi Weeblerock,

    That's interesting. The fact that it's not seeing the drive even in System Profiler is not a good sign, as the drive isn't even being seen at the bus (I/O) level. Is it a bus powered drive or does it draw power from the wall as well?

    The fact that the drive isn't even being seen via System Profiler tells me that it's not a partition/formatting issue but more of a hardware compatibility issue. Any other external HDs to test against?
    13" MacBook Pro (2.4GHz/4GB/250), Mac OS X (10.6.4)
  • cmubigguy Level 1 Level 1 (0 points)
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    Sep 6, 2010 8:56 PM (in response to Weeblerock)
    Having same problem - I have tried three hard drives and three cords. Recently installed an update that Apple pushed down, could this have something to do with it?
    Macbook Pro, Mac OS X (10.6.4)
  • ahs2010 Level 1 Level 1 (0 points)
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    Sep 8, 2010 3:30 PM (in response to Weeblerock)
    I am having the same issue. Seagate replaced my 500gb drive and it is still not recognized by my Macbook Pro. Can you guys let us know if there is an issue with macbook's compatibility with the Seagate Hard drives.
    Mac Book Pro, Mac OS X (10.5.8)
  • Ganamex Level 1 Level 1 (0 points)
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    Sep 21, 2010 5:50 PM (in response to Weeblerock)
    Jumping into this thread to say I've run into the same problem--my WD Elements 1TB drive works fine on Windows computers (I've tried a few), but my Macbook Pro won't even pick it up at the I/O level. I'd reformat the drive if I could only get my Mac to recognize that the darn thing exists, heh. Any suggestions appreciated...
    Macbook Pro, Mac OS X (10.6.4)
  • CbuscCycler Level 1 Level 1 (0 points)
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    Oct 14, 2010 5:49 AM (in response to Ganamex)
    I have the same problem. I have been using an external hard drive for a few months now and all of a sudden my Macbook has stopped recognizing the drive when I plug it in as I always correctly had done. It says TimeMachine is Delayed. My last back up was Oct 2, 2010. I have tried restarting my computer with the drive attached and with it not attached. Still does not recognize it. When I say recognize I mean it does not show up on the desktop and the time machine application cannot see any attached drives.
    Any help is appreciated.
    Thank you
    MacBook Pro 13 inch, Mac OS X (10.6.4)
  • Co de Kleuver Level 1 Level 1 (0 points)
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    Oct 17, 2010 12:11 AM (in response to CbuscCycler)
    I have the same problem where the system has suddenly decided to stop recognising my USB drive. until recently all my backups were on this drive, now it cannot find it???
    What is going on? was it the latest software update??
    How do I get it back?
    Please help
    Macbook pro, Mac OS X (10.6.4)
  • Co de Kleuver Level 1 Level 1 (0 points)
    Just thought I let you know, i reformatted (deleted ) the drive sacrificing previous backups and immediately the drive was recognised by my system and the icon appeared on the desktop.
    I believe that the last upgrade to the mac software is the culprit that made the drive disappear until reformatted.
    It may be a price to pay to reformat but at least you get the drive back and can do a new backup.
    Hope this helps
    Co

    Message was edited by: Co de Kleuver
    Macbook pro, Mac OS X (10.6.4)
  • blondieblue227 Level 1 Level 1 (5 points)
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    Nov 4, 2010 12:20 PM (in response to Weeblerock)
    QUESTION

    i too have a wd external hard drive.
    i lucked out and my mac recognized it so i got my files off. but now the mac is not finding now.
    so how do i reformat it to mac?
    the HS still comes up on my windows computer so....

    can i reformat to mac while i have it plugged up to a PC?

    thanks so much.
    5G iPod 30GB, 6G iPod Video 120GB, iMac, Mac OS X (10.6.4), haven't had an "apple" since the IIe, tastes good to be back.
  • blondieblue227 Level 1 Level 1 (5 points)
    "Just thought I let you know, i reformatted (deleted ) the drive sacrificing previous backups and immediately the drive was recognised by my system and the icon appeared on the desktop."

    system being mac OS?
    are you saying if you wipe the WD mac will recognize it?
    5G iPod 30GB, 6G iPod Video 120GB, iMac, Mac OS X (10.6.4), haven't had an "apple" since the IIe, tastes good to be back.
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