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Mac Could Not Unmount Disk External Hard Drive

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The caveat is that the drive will start indexing when connected again, however. You can also subscribe without commenting. Reply Ava says: July 8, 2016 at 11:44 am i managed to install el capitan on the external drive and use terminal to force erase the disk. I've tried the original text and the one you suggested to Jon and it still says ‘command not found' Any ideas what's up? http://jessriegel.com/unmount-disk/formatting-external-hard-drive-for-mac-could-not-unmount-disk.html

Please reload CAPTCHA. × four = 20 Notify me of followup comments via e-mail. When the computer is off, you can safely disconnect the drive. Zognoh 806.136 görüntüleme 3:28 How to Format An External Hard Drive for Mac - Süre: 5:16. A simple eject through Disk Utilities always works for me when an external drive of any kind won't eject because it's "in use." –Tim Undheim Dec 19 '14 at 20:01 https://discussions.apple.com/thread/4503583?tstart=0

Disk Utility Couldn't Unmount Disk External Hard Drive

For the older Mac OS X like 10.6 or earlier, the opportunity lies in a SuperDrive and a bootable DVD, and this can also offer the same resolution. (3) Fixing With Worked for me this morning. Please double-check your typing when using sudo. I would suggest copy and paste.

Click OK to proceed. 2) The Image file created by the software needs t be burn on DVD. and tell TextEdit that yes, you do want to save it with a dot at the front (which will make it invisible.) I'm not sure whether that will stop it right I will be linking this solution to other forums in the future. Partition Failed With The Error Couldn't Unmount Disk Any ideas?

You can change this preference below. DON'T DO ANY OF THE FOLLOWING IF YOU ARE NOT FAMILIAR WITH THE COMMAND LINE AND UNIX - ELSE YOU CAN DAMAGE YOUR COMPUTER SERIOUSLY. Don't forget to like or put "This solved my question" or "This helped me"!Good luck!from Galaxy User Nov 17, 2013 5:03 PM Helpful (0) Reply options Link to this post by http://www.stellarinfo.com/blog/couldnt-unmount-disk-error-mac/ Upon using the second command, I got an error stating that the disk couldn't be unmounted.

thank you so much. Error 69888 Couldn't Unmount Disk McClane is a NYPD cop. Using an external drive or OS X Recovery for the starting up of the Mac from another bootable drive. Were Palpatine or Vader ever congratulatory or nice to any of their subordinates?

Disk Utility Can't Unmount External Disk

Reply Alan Siu says: July 8, 2016 at 10:18 am Sierra is still beta, right?

How do organic chemistry mechanisms become accepted? Disk Utility Couldn't Unmount Disk External Hard Drive Reply Del Rey says: December 3, 2016 at 6:45 pm Worked for me reformatting a Seagate Backup plus to use with OS 10.6.8. Couldn't Unmount Disk Mac Uncheck use extension "txt" ...

Reply Ian Small says: January 30, 2016 at 2:57 pm Brilliant! http://jessriegel.com/unmount-disk/formatting-hard-drive-could-not-unmount-disk.html Thank you so much 🙂 Very clear instructions! Now it won't start indexing the disk the next time you connect, so you won't have the problem again in the future. Assuming you're on OSX, if you're still unable to unmount it, you can try forcing an unmount by issuing the follow command: sudo umount -f /Volumes/External_HD_Name Alternatively, try forcing an unmount Can't Unmount Disk Mac

If the external El Capitan absolutely refuses to unmount the disk, can you try booting into Recovery Mode (hold down Cmd-R while booting up) and then using Disk Utility there? worked perfectly. Ekle Bu videoyu daha sonra tekrar izlemek mi istiyorsunuz? http://jessriegel.com/unmount-disk/format-external-hard-drive-mac-error-could-not-unmount-disk.html This will not work if the error was triggered by attempting to modify the boot disk through partitions or formatting, and you will need to use the method above instead.

Thank you so much. Force Unmount Mac Reboot the Mac holding down the "Option" key and choose the Recovery partition Select "Disk Utility" from the boot menu Go to "First Aid" to verify and repair the disk, or Alternativly you can prevent a device from being automatically mounted following this tutorial.

Reply Monish d kothari says: September 13, 2015 at 6:17 am For people unable to boot from other disk ( elaborated method) : * Download the OS X firmware form App

If the internal drive is causing the issue because the OS X Recovery exists as a partition on the physical disk, unable to modify or unmount the internal drive, then the Bu videoyu bir oynatma listesine eklemek için oturum açın. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will Volume Erase Failed Couldn't Open Disk How to choose origin in rotational problems to calculate torque?// Is torque frame dependent?

Many-2 thanks for such a valuable blog post. See all these arguments and more by typing mdutil into your command line. –Dannid Dec 3 '15 at 22:45 2 Liked the tip, but please don't suggest exiting after the Back up as many of your files as possible, reformat the disk, and restore your backed-up files' I unsure of my disk right now and need some solution asap. have a peek at these guys What happens if you try this?

In that case, you'll need to boot from a separate USB drive to fix the error. I think it should be formatted Mac OS Extended (Journaled) Nov 27, 2012 4:43 AM Helpful (0) Reply options Link to this post by elliswicks, elliswicks Nov 27, 2012 4:44 AM The reason I ask is I've found out what my problem is when TM says it's not able to do a backup. Restart the computer and hold the Command+R keys until you see the Apple symbol.

Hope this helps. sudo killall mds And then (quickly) try ejecting the volume again. Last week, Time Machine's backup failed, with the message "Unable to complete backup. But the dialogs Kurt is seeing aren’t the informative kind that tell you which app is involved.

Would presence of MANPADS ground the entire airline industry? If you try to eject, it should say 'Trying to eject your drive' (or similar) and after a minute or so (of being unsuccessful), show another popup that have an option Once done, you Mac will start with Yosemite and your disk drive now becomes singe partitioned. But my Mac stubbornly refuses and says that an application may be using the disk.