External hard drive won't show up on MBA

Discussion in 'Mac Basics and Help' started by tmartin89, Dec 30, 2014.

  1. tmartin89 macrumors newbie

    Joined:
    Dec 28, 2014
    #1
    I have a Toshiba 500gb external hard drive that shows up perfectly fine on Windows but will not show up on my MBA. The lights will come on and everything sounds normal but it will not show up anywhere, not even in disk utility. I formatted it to exFAT on my Windows to work on my MBA but it will not show up anywhere, any ideas?

    Thanks!
     
  2. rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #2
    with the hard disk on the usb port, does it even show up in system report?

    click on the apple upper left hand corner
    click on about this mac
    click on system report
    click on usb

    you should see either the hard disk or the usb to sata bridge on the list of usb devices

    if its been formatted at EXFAT then it should work.

    maybe try formatting it to EXFAT again on another mac

    it is just one big exfat parition with no other partitions, right?

    bugger, it should work

    are you running recent os x ???

    obscure usb to sata bridge board that os x doesn't have drivers for ?? ( doubt it)

    are you using a hub?

    is this a hybrid drive of any sort?
     
  3. tmartin89 thread starter macrumors newbie

    Joined:
    Dec 28, 2014
    #3
    It does show up on system report. I tried it on my wife's mac and it didn't come up on hers either.
     
  4. maccompaq macrumors 65816

    maccompaq

    Joined:
    Mar 6, 2007
    #4
    If it is formatted as NTSF, it will not work on a Mac.
     
  5. rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #5
    he already said it was formatted as exFAT

    if its not formatted as ntfs like the op said, then obscure bridge board that os x does not have drivers for is the only thing i can think of that would cause this

    any usb device has to have some kind of drivers for it to work

    it should of come up with a window that says this device is unreadable

    or it should of said not partitioned in disk utility
     
  6. tmartin89 thread starter macrumors newbie

    Joined:
    Dec 28, 2014
    #6
    I just plugged my hard drive into my Windows computer and it now says its on NTFS and will not give me the option to format it to anything else?!
     
  7. tmartin89 thread starter macrumors newbie

    Joined:
    Dec 28, 2014
    #7
    Managed to get it back to exFAT, however it still wont show up on MBA. Any other ideas?
     
  8. Fishrrman macrumors G4

    Fishrrman

    Joined:
    Feb 20, 2009
    #8
    Is the drive a 2.5" drive, or is it a 3.5" drive?

    Does it have a port for an external power supply of some sort?
    Did the drive come with a power supply?

    IF the drive is "bus powered" (i.e., no additional power supply):
    It's possible that the MBAir isn't supplying enough bus power to get the drive "up and running" on the desktop...
     
  9. tmartin89 thread starter macrumors newbie

    Joined:
    Dec 28, 2014
    #9

    The drive is bus powered. When plugged into the MBA the light does come on and it seems like it powers up just fine.
     
  10. Fishrrman macrumors G4

    Fishrrman

    Joined:
    Feb 20, 2009
    #10
    [[ The drive is bus powered. When plugged into the MBA the light does come on and it seems like it powers up just fine. ]]

    Again, even though the light "lights" and you hear the drive spin, that in itself may not be enough. Again, it might still be a "not enough power" issue.

    Does the drive have a "port" to accept an external power source?
    Are there any voltage settings specified?

    I would try a "universal" power supply (can be found at places like Radio Shack, online, etc.) provided I knew the required input voltage and had the right fitting.
    You can probably find one of these for around $10-15.

    If you're not willing to try that, I would at least try the drive on a couple of -other- Macs than yours and your wife's. Do you get the same results (fails to mount?).

    In that case, I'd start looking around for another drive....
     
  11. tmartin89 thread starter macrumors newbie

    Joined:
    Dec 28, 2014
    #11
    It does not have an external power port. I'm pretty close to buying another hard drive. There's obviously something stopping it from mounting on the MacBook.
     

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