Resolved rMB occasionally doesn't recognize external drives

Discussion in 'MacBook' started by ApolloBoy, Aug 2, 2016.

  1. ApolloBoy, Aug 2, 2016
    Last edited: Sep 27, 2016

    ApolloBoy macrumors 6502a

    ApolloBoy

    Joined:
    Apr 16, 2015
    Location:
    San Jose, CA
    #1
    I'm having a bizarre issue with my rMB, every now and then it doesn't recognize external drives, whether it's a flash drive, hard drive or an optical drive. It does this with both my USB-C hub (http://amzn.to/2b1kB2g) and my USB-C adapters (http://amzn.to/2aPuNi1), and the only way to totally fix it is to do a restart (and of course it wears off after a while). Is anyone else having the same issue?

    EDIT: Updating to Sierra totally resolved this problem, I've been on Sierra for a week as of this edit and my external drives get recognized every single time as they should be. Glad that Apple squashed this bug flat.
     
  2. Admiral macrumors regular

    Admiral

    Joined:
    Mar 14, 2015
    #2
    You're on OS X 10.11.3 or 10.11.4, correct? This is a bug introduced in 10.11.3 and fixed in 10.11.6. Update your OS X install and it will go away.

    It drove me crazy.
     
  3. ApolloBoy thread starter macrumors 6502a

    ApolloBoy

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    Apr 16, 2015
    Location:
    San Jose, CA
    #3
    Nope, I'm on 10.11.6.
     
  4. Admiral macrumors regular

    Admiral

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    Mar 14, 2015
  5. evec macrumors regular

    Joined:
    Jun 8, 2016
    #5
    Very bad.
    It is a bug on Macbook 12 for el captain after sleep the USB 3.0 non function and no fixed until 10.11.6.
     
  6. Admiral macrumors regular

    Admiral

    Joined:
    Mar 14, 2015
    #6
    Is it after sleep? My experience with the bug (a different bug, I guess) was that after eject the USB drive would not re-mount without a reboot. For me that experience has ended.
     
  7. c0ppo macrumors 6502a

    c0ppo

    Joined:
    Feb 11, 2013
    #7
    Same thing here. And the 'experience' is still here, only rebooting helps.
     
  8. mathpunk, Aug 4, 2016
    Last edited: Aug 6, 2016

    mathpunk macrumors regular

    mathpunk

    Joined:
    Jan 31, 2015
    #8
    Same here. I wonder if this is fixed in Sierra?

    ETA:

    I installed macOS Sierra PB3....and the problem persists.
     
  9. ApolloBoy thread starter macrumors 6502a

    ApolloBoy

    Joined:
    Apr 16, 2015
    Location:
    San Jose, CA
    #10
    This is odd, when I tried plugging in one of my external drives through a USB 3 cable my rMB wouldn't recognize it, but when I tried the same drive with a USB 2 cable it worked fine (albeit at a slower speed of course). Hmmm...
     
  10. macintoshmac macrumors 65816

    macintoshmac

    Joined:
    May 13, 2010
    #11
    Yeesh. If you wanted to use external drives so much, should have gotten a MacBook Pro. ;):p
     
  11. ApolloBoy thread starter macrumors 6502a

    ApolloBoy

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    Apr 16, 2015
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    #12
    How about you stop harassing me? Pretty goddamn stalkerish if you ask me.
     
  12. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #13
    Please, which makes and models?

    Have you tried a new cable and if so, what was the brand?

    If a drive is limited to USB 2.0, then that may be a factor. 2.0 is sometimes described as not ideal for storage.

    (I'm seeking reliable information about 3.0 and C.)
     
  13. ///M5 macrumors 6502

    Joined:
    May 14, 2009
    #14
    I'm in the same boat here. I use the dell USB-C hub and, in order to make it work, I have to restart the Macbook every morning. Otherwise it only recognizes the screen, all other USB devices are not recognized.

    Pretty annoying to say the least. Mine is the latest Macbook, top specs, and latest OS.
     
  14. objektør macrumors regular

    objektør

    Joined:
    Nov 25, 2014
    Location:
    At home
    #15
    Same here.
    USB 3.0 not recognized. No problems with USB 2.0 drives or other USB devices. My Elgato eye TV usb stick works fine when connected with Anker usb3.0 to USB-C adapter.

    I use an USB-C data cable for my HDD (seagate), not an adapter. Still doesn't work.
     
  15. cursedearth macrumors member

    Joined:
    Sep 13, 2011
    #16
    My rMB has never had a problem recognising USB drives or any other USB devices. However, every now and then it fails to detect my WD 500 GB HDD. A restart is the only solution.
     
  16. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #17
    For me, the previously seeded build usually failed to automatically mount some or all of the non-startup volumes that are on the same disk as the startup volume. Hard disk drive, USB 2.0.

    With the currently seeded build, I have not noticed that problem.
     
  17. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #18
    Build 16A294a of pre-release macOS Sierra

    A recurrence of the problem.

    HFS Plus startup volume (encrypted with Core Storage), three other HFS Plus volumes (without Core Storage) on the same disk.

    The operating system failed to automatically mount one of those three.

    No coincidental hogging of the CPU.

    If the MacBookPro8,2 is compatible with HDAT2 on UBCD, I might perform a thorough check of the disk. I expect that check to take a few days.
     
  18. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #19
    I forgot to mention, the Mac that I use for testing is different from the opening poster's.

    Here: early 2011 MacBookPro8,2 with 4 GB memory.

    Please: on what Mac was that?
     
  19. objektør macrumors regular

    objektør

    Joined:
    Nov 25, 2014
    Location:
    At home
    #20
    Thanks. I tried this and it works for me as well.
    It is not how it should be but it is a relatively nice workaround in some cases where I just need to check my external HDD or want some smal files without having to reboot my rMB.
     
  20. ApolloBoy thread starter macrumors 6502a

    ApolloBoy

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    Apr 16, 2015
    Location:
    San Jose, CA
    #21
    Just updated to Sierra, this issue seems to be completely fixed now.
     
  21. Admiral macrumors regular

    Admiral

    Joined:
    Mar 14, 2015
    #22
    I should hope so. Now back the fix into an El Capitan update, Apple!
     
  22. grahamperrin macrumors 601

    grahamperrin

    Joined:
    Jun 8, 2007
    #23
    @ApolloBoy if you like, edit the subject line/title of your opening post to show that the topic is resolved.

    (Not the Edit button. There's an unlabelled cog icon.)
     

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