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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 Vishal2014,

    Vishal2014 Vishal2014 Jul 30, 2016 8:58 PM in response to Weeblerock
    Level 2 (202 points)
    Mac OS X
    Jul 30, 2016 8:58 PM in response to Weeblerock

    IS your external hard drive formatted with NTFS? Macs doesn't write to NTFS formatted file systems.

  • by Elrich Thain,

    Elrich Thain Elrich Thain Jul 31, 2016 2:42 PM in response to jacksonian71
    Level 1 (4 points)
    Jul 31, 2016 2:42 PM in response to jacksonian71

    Dang I'm an idiot. Same issue here, putting 3.5 internal into docking station. Spent way too long before finding this and doing the obvious "turn it off and turn it on again." Just here to verify for future others (probably me) that this solved my issue as well. Thanks @jacksonian71!

  • by musicbud,

    musicbud musicbud Aug 15, 2016 3:23 PM in response to Weeblerock
    Level 1 (4 points)
    Aug 15, 2016 3:23 PM in response to Weeblerock

    Hi.  I've spent a lot of time scouring the internet looking for help.

     

    -I have a 500GB Western Digital My Passport external USB drive and a 1TB Western Digital My Passport external USB Drive.  Both are formatted OSX Extended Journaled.

    -My computers are:

    1 - 2011 MacBook Pro 13" (personal)

    2 - 2012 MacBook Pro 13" (work)

    3 - 2012 MacBook Pro 13" (work2)

    All three systems are running the latest version of OSX El Capitan.

     

    Both external drives are no longer being recognized by my work systems, computers 2 and 3.

    Nowhere in Finder, Disk Utility, or anywhere else.  They used to be, but after upgrading to El Capitan the disks stopped showing up anywhere on these machines.  The disks are getting power and spinning, though.

    However, both drives show up on my personal system, computer 1 - immediately and work flawlessly!

     

    I'm at a loss because 2/3 of my systems no longer recognize the external drives.

    I've powered down, changed cords, stood upside down, chanted, sung some songs, and caressed the machines nicely.

     

    Any help, please?

     

    Thanks!

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