Alan Musgrave

Q: "Disk Not Ejected Properly" error after El Capitan

It's back ... Had the same problem for a few months after installing Yosemite ... but it eventually went away.

 

Now getting this error after installing El Capitan last week. Problem surfaces after my iMac sleeps.

 

Using a Lacie 2TB external on USB3 for Time Machine.

 

If anyone has ideas, similar problem or a fix, please help ... thks.

iMac, OS X El Capitan (10.11)

Posted on Oct 6, 2015 12:24 PM

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Q: "Disk Not Ejected Properly" error after El Capitan

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  • by Keith Curtis,

    Keith Curtis Keith Curtis Jan 15, 2016 4:57 PM in response to Alan Musgrave
    Level 1 (0 points)
    Jan 15, 2016 4:57 PM in response to Alan Musgrave

    Yet another person with the same problem. Zapping the PRAM did not help for me, neither did messing with the energy settings. I have not tried re-wiring my USB items so that the two external drives in question are directly connected because !A) that would take two ports, and B) It appears to have worked for exactly no one.

     

    This problem occurred immediately upon upgrading to El Capitan. No other changes in hardware or software or configuration. Frustrating.

  • by ScottinPA,

    ScottinPA ScottinPA Jan 15, 2016 5:07 PM in response to Keith Curtis
    Level 1 (0 points)
    Jan 15, 2016 5:07 PM in response to Keith Curtis

    I Found that erasing/formatting my (Brand new) external hard drive and establishing a fresh backup solved my problem.

  • by drdawnmac,

    drdawnmac drdawnmac Jan 16, 2016 11:28 AM in response to ScottinPA
    Level 1 (4 points)
    Mac OS X
    Jan 16, 2016 11:28 AM in response to ScottinPA

    I had been thinking of trying that but I had been holding off. Didn't want to lose my Time Machine backups. Finally bit the bullet.

     

    Sorry to say, didn't fix the problem. I was able to complete a full Time Machine backup, but as soon as the computer went to sleep, I got the very familiar error message again.

  • by martinmpls,

    martinmpls martinmpls Jan 16, 2016 12:12 PM in response to horseshoe7
    Level 1 (0 points)
    Jan 16, 2016 12:12 PM in response to horseshoe7

    The app Mountain solved my problem! Thanks! I've been running about four weeks without the error message that my disk was ejected improperly. The disk drive stays mounted. I use it for media (iTunes and iPhoto) but not Time Machine backups. Thanks for the tip!

  • by Alan Musgrave,

    Alan Musgrave Alan Musgrave Jan 20, 2016 6:29 PM in response to Alan Musgrave
    Level 1 (14 points)
    Jan 20, 2016 6:29 PM in response to Alan Musgrave

    Updated to 10.11.3 last night and noticed a disk error message this morning. So I guess no fix yet. Anyone notice any difference after updating. The update process went smoothly on our 3 macs but the disk eject error problem continues.

  • by shungite,

    shungite shungite Jan 22, 2016 5:41 AM in response to shungite
    Level 1 (0 points)
    Jan 22, 2016 5:41 AM in response to shungite

    I take it back, my 'solution' mentioned earlier did not work! This must be a Time Machine (which is using the drive) issue, as another USB drive has no problems whatsoever.

  • by WAVARI,

    WAVARI WAVARI Jan 23, 2016 9:36 AM in response to Alan Musgrave
    Level 1 (0 points)
    Jan 23, 2016 9:36 AM in response to Alan Musgrave

    Same problem in Belgium: 'Disk not ejected properly' after iMac awakes from sleep. Happens since El Capitan, also after version 10.11.3, also after starting up with the procedure 'alt, cmd, p, r'.

  • by kaushikc,

    kaushikc kaushikc Jan 28, 2016 9:00 PM in response to ScottinPA
    Level 1 (0 points)
    Jan 28, 2016 9:00 PM in response to ScottinPA

    I have exactly the same issue with Lacie 8TB and iMac 2013.

  • by rafaelivanpr,

    rafaelivanpr rafaelivanpr Feb 18, 2016 8:30 AM in response to Alan Musgrave
    Level 1 (0 points)
    Feb 18, 2016 8:30 AM in response to Alan Musgrave

    Solved ... Simply remove drivers .. In my case WD My Book. Look for WD+ Turbo Installer and remove drivers. It works for me !!!

     

    Look for WD Macintosh + TURBO Drivers

    http://supportdownloads.wdc.com/downloads.aspx?DL

  • by Clive Lonie,

    Clive Lonie Clive Lonie Mar 6, 2016 6:16 AM in response to rafaelivanpr
    Level 1 (0 points)
    Mar 6, 2016 6:16 AM in response to rafaelivanpr

    I use a late 2014 iMac Retina 5K 27" with OS X El Capitan version 10.11.3 installed and my WD 3TB USB 3 portable hard drive plugged into a USB port on the back of my Mac.  . I've been intermittently receiving the dreaded "disc not ejected properly" error messages  after which my WD 3TB My Book disappears from my desktop and Time Machine (which uses the WD for backups) cannot find the WD either. Having read all of the posts in this string and have tried several of the suggested fixes, the only thing that works for me is the following combination:

     

    First, power everything down.  Remove the power and USB cables from the portable hard drive (and also remove the power cable from the mains).  Reboot the MAC and and wait until the OS is fully loaded.  Then plug the power cable into the the hard drive and then the mains and switch on using the power button.  Wait a few seconds while hard drive does it's internal checks (the power light may flash to show completion of checks).  Now plug the USB cable into the hard drive and then into the Mac (this combination also seems to work if I plug into a USB mains powered hub that I have).  After a second or two the my hard drive appears back on my desktop (and reappears in Time Machine which does an immediate backup).

     

    After many years using Windows I switched to a maxed-out Mac expecting/hoping for high performance, reliability and good support.  Thus far I am not impressed with having to go through the above 'ritual' just to get access to my data and backups!  I believe this to possibly be an El Capitan issue and think it's deplorable that when there are so many forums on the 'net' mentioning this problem, Apple haven't either openly admitted the problem exists and said they're working on a fix, or resolved the issue IF they are capable of doing so.

     

    Good luck, I hope this helps.

  • by WAVARI,

    WAVARI WAVARI Mar 24, 2016 10:31 AM in response to Alan Musgrave
    Level 1 (0 points)
    Mar 24, 2016 10:31 AM in response to Alan Musgrave

    Problem solved with update El Capitan 10.11.4

  • by drdawnmac,

    drdawnmac drdawnmac Mar 24, 2016 12:37 PM in response to WAVARI
    Level 1 (4 points)
    Mac OS X
    Mar 24, 2016 12:37 PM in response to WAVARI

    Ran the update. All seemed fine. Disk mounted on restart.

     

    Just got back to wake up the computer and there it is: Disc not ejected properly.

     

    Oh well.

  • by Maurizio Orlandi,

    Maurizio Orlandi Maurizio Orlandi Mar 24, 2016 4:36 PM in response to drdawnmac
    Level 1 (49 points)
    Mar 24, 2016 4:36 PM in response to drdawnmac

    Yes, unfortunately the problem is still there, even with El Capitan 10.11.4.

     

  • by ChrisPea,

    ChrisPea ChrisPea Mar 24, 2016 4:48 PM in response to Maurizio Orlandi
    Level 1 (4 points)
    Mar 24, 2016 4:48 PM in response to Maurizio Orlandi

    I have been following this and similar threads for ages now and having bricked an external WD HDD to this problem the only solution I can come to is to back up, eject my drive and unplug until the next time a backup is due. Pretty much doing Time Machine's job!

  • by drdawnmac,

    drdawnmac drdawnmac Mar 28, 2016 7:31 AM in response to Alan Musgrave
    Level 1 (4 points)
    Mac OS X
    Mar 28, 2016 7:31 AM in response to Alan Musgrave

    I do see a change with the latest update.

     

    1. My disk (directly plugged into my iMac USB port) now mounts consistently at startup.

    2. After waking from sleep and dismissing the disk not ejected properly message, I hear my disk make some noise (sounds like it is spinning up and down), and then it reappears on my desktop again.

     

    Prior to this update, the only way I could get the disk to mount would be to unplug it and then plug it in again.

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