Results 1 to 5 of 5
  1. #1
    External hard drives not recognized by new imac

    Member Since
    Sep 02, 2010
    Posts
    3
    External hard drives not recognized by new imac
    I recently purchased a 27 inch iMac and I am unable to get my external hard drives to mount. One is a new seagate and the other is a simpletech that is several years old. Both are NTFS formatted and neither of them show up on desk utility or system profiler. I downloaded Tuxera NTFS-3G but that did not help. Both external hard drives work on my PC laptop and on a friends 24 inch iMac. I know the USB ports work because I have a card reader and a flash drive that work no problem. Anybody have any idea what might be the problem?

  2. #2
    External hard drives not recognized by new imac
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,231
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    If neither of them are showing up from Disk Utility or the System Profiler, it could be caused by too much power being drawn from the USB ports or the ports are not working right. Card readers and flash drives generally draw very little power compared to most hard drives or an iPod.

    You might want to run the Apple Hardware Test on your machine to see if anything shows up.

  3. #3
    External hard drives not recognized by new imac

    Member Since
    Sep 02, 2010
    Posts
    3
    Ok. I tried 2 other hard drives, one formatted NFTS and the other some Windows format, and they both worked. I'm baffled.

  4. #4
    External hard drives not recognized by new imac
    DavidHH's Avatar
    Member Since
    Feb 28, 2010
    Location
    Hamilton, Ontario
    Posts
    256
    Specs:
    21.5" iMac i5 2.9 Ghz, 15" MBPro i7 2.0 Ghz, iPhone 5, iPhone 4s, ATV2, ATV3, iPad2, iPad Mini
    USB Power
    Quote Originally Posted by chscag View Post
    If neither of them are showing up from Disk Utility or the System Profiler, it could be caused by too much power being drawn from the USB ports or the ports are not working right. Card readers and flash drives generally draw very little power compared to most hard drives or an iPod.

    You might want to run the Apple Hardware Test on your machine to see if anything shows up.
    It still might be the USB Power as the other units you tried might draw less power.

    Are you plugging the driver directly into the computer?

    DavidH

  5. #5
    External hard drives not recognized by new imac

    Member Since
    Sep 02, 2010
    Posts
    3
    I think you're right. I tried two smaller external hard drives and they both worked fine on my iMac. Both of the hard drives that fail to mount are much larger (320GB and 500GB) with external power supplies. These do, however, work on an older 24 inch iMac. This is actually my 2nd 27 inch iMac in a month because Apple replaced the original with the exact same problem. Is this a common problem for them I wonder?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. OS X Lion will not read external hard drives and USB flash drives
    By tompam in forum OS X - Operating System
    Replies: 71
    Last Post: 04-21-2012, 01:16 AM
  2. Replies: 0
    Last Post: 11-14-2010, 04:37 PM
  3. External Hard Drives for iMac/ WD MyBook Questions..
    By Geardaddys in forum Other Hardware and Peripherals
    Replies: 6
    Last Post: 02-17-2008, 07:13 AM
  4. Converting pc internal hard drives to Imac extneral hard drives
    By kforum in forum Other Hardware and Peripherals
    Replies: 2
    Last Post: 08-03-2006, 10:43 PM
  5. Any external hard drives that match the iMac?
    By kaidomac in forum Apple Desktops
    Replies: 0
    Last Post: 02-04-2006, 10:15 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •