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Error Could Not Unmount Disk Disk Utility

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Do you know what might be causing this? Retox Media 16,568 views 2:29 How to Format An External Hard Drive for Mac - Duration: 5:16. WhyNotVideo211 46,082 views 4:57 How to Fix a Corrupt Mac Harddrive in 10.8 - Duration: 3:03. Any help would be great. http://strobelfilms.com/unmount-disk/disk-utility-partition-error-could-not-unmount-disk.html

The errors could have been unresolvable without a boot drive. Easy Steps 14,351 views 4:05 How to reset your MacBook Pro to Factory Settings without Installation Discs - Duration: 3:28. Locate your drive and right click on it. Skip navigation Sign inSearch Loading...

Disk Utility Couldn't Unmount Disk External Hard Drive

Be sure you backup your files to an external drive or second internal drive, the following procedure will remove everything from the hard drive! 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. Reply Lauri says: August 17, 2016 at 12:56 pm I had hoped…. 🙁 Didn't work for me - I've been trying anything and everything to get my external to show back

I would strongly recommend at this stage attempting to back up any data that is required before proceeding with the following steps. Most Liked Posts Bennieboy©, Apr 2, 2010 Bennieboy© macrumors 65816 Joined: Jan 15, 2009 Location: england #1 Hey guys, i'm trying to format a spare external, it's currently formatted to ms-dos You can resize the Macintosh HD as required. Error 69888 Couldn't Unmount Disk Providing links can also help the OP, and others, find additional info for themselves.

Close Yeah, keep it Undo Close This video is unavailable. Volume Erase Failed Couldn't Unmount Disk Philip H. 7th August 2015 at 5:14 pm · Reply I'm in the same boat with Crystal. Thanks a lot Kelvin 30th August 2015 at 3:21 am · Reply I got same error:-69888. Reply Shoug says: September 20, 2016 at 12:40 pm i have the same prob and am doing this coz i forget ma macbook password and now !!

When I go into Disk Utilities > Erase tab > change Volume Format to Mac OSX Extended > click erase, it keeps saying disk "Erase failed with the error: File system Volume Erase Failed Couldn't Open Disk Regards. Reply Joel May 18, 2015 My Mac is single drive partitioned but I created another partition named "Mac HD2" to download Yosemite on it. Even after I tried your final option, I got this message: Error: -69888: Couldn't unmount disk I've already recovered my files from the computer—all I want to do is wipe it

Volume Erase Failed Couldn't Unmount Disk

I also have 1TB Seagate external hard drive.

PLEASE HELP!! Disk Utility Couldn't Unmount Disk External Hard Drive If you have an image you would like to clone to it use the clone option. Partition Failed With The Error Couldn't Unmount Disk FOR AN ENTIRE PHYSICAL DISK: 1) Using the Terminal application again, booting from OS X Recovery or an external bootable drive.

Reply John says: August 10, 2016 at 1:13 am You can force unmount a drive by running the following Terminal command: diskutil unmountDisk force /Volumes/VOLUMENAME Replace VOLUMENAME with the name of http://strobelfilms.com/unmount-disk/could-not-unmount-disk-error-disk-utility.html Enter the following where ‘x' is your disk identifier. (Remember to use the ‘diskutil list' command if you need to find out your disk identifiers): sudo diskutil unmount force /dev/diskx 2) I am running iMac 2011 OS X 10.9. Reply Dr1ver105 says: September 4, 2016 at 11:47 am I knew there had to be an "easy" way to do this, and this was it. Can't Unmount Disk Mac

Ask Different works best with JavaScript enabled Got a tip for us? Otherwise, click on the Partition tab in the DU main window.3. Reply Sheryl Brown March 7, 2016 I must Thank You for resolving mu issues. this content Look complicqted to far added agreeable from you!

Keep it unmounted and then erase in Disk Utility. Disk Erase Failed With The Error Couldn't Open Device You should now be able to erase the drive. Sign in Transcript Statistics 10,441 views 17 Like this video?

Reply John says: August 10, 2016 at 1:13 am You can force unmount a drive by running the following Terminal command: diskutil unmountDisk force /Volumes/VOLUMENAME Replace VOLUMENAME with the name of

Reply joe says: May 4, 2016 at 5:58 am Thank you! Have an external hard drive, which i used to boot up the iMac with el capitan, but i am still in the process of trying to erase the internal drive. The HDD has been acting up recently, very slow performance, bad behavior etc. At Least One Volume Could Not Be Unmounted Otherwise, we follow the steps: The Mac is rebooted, with the OPTION key being held down and the Recovery Partition is chosen The Disk Utility is chosen from the Boot Menu

Reply Adrie says: October 14, 2016 at 10:39 am Great answer. I need to get this one fixed and get the internal one running again, because i can't have two computers running off one external drive, and i still need to fix Sign in to make your opinion count. http://strobelfilms.com/unmount-disk/error-could-not-unmount-disk-disk-utility-mac.html Stellar Phoenix Mac data recovery is free-to-preview software that allows preview of deleted, formatted and lost files in demo version.

Click OK to proceed. 2) The Image file created by the software needs t be burn on DVD. About The Author Vishal Vishal is a Mac data recovery expert at Stellarinfo.Com. To create bootable media and accomplish the task you need to register the software through Stellar Partition Manager Buy Now Page. Sep 23, 2011 2:07 PM Helpful (0) Reply options Link to this post by Kappy, Kappy Sep 23, 2011 2:13 PM in response to hoosier Level 10 (274,127 points) Desktops Sep

Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the disk). But now I am getting following error while trying to erase or paritition primary internal HD: "wiping volume data to prevent future accidental probing failed". Angelo Maralit 214,796 views 4:13 Loading more suggestions... Any OS X boot drive is needed to complete the task.

Comments(34) Mabaker May 13, 2015 My Disk Utility is unable to resize Macintosh HD. The fist step has worked perfectly. In a moment of "what the heck, try this," while in Disk Recovery mode, I ran Fix Disk Permissions, then, voila! Following this, attempt to Erase/Partition the drive again in Disk Utility.

You can also subscribe without commenting. Reply Audrey Hain November 10, 2016 Hi, I am a MacBook Pro user, and I am unable to boot my Mac system from other disk. Junaid Rupani 878,158 views 6:06 How to ║ Restore Reset a Macbook A1278 to Factory Settings ║ Mac OS X - Duration: 3:58. I'm having the same issue.

Author Alan SiuPosted on April 13, 2015Tags disk utility, diskutil, erase drive, mac, unmount 40 thoughts on “Fix for disk erase failed couldn't unmount disk” Randall says: July 14, 2015 at Took about 5-10 minutes. Easy Steps 14,351 views 4:05 Mac OSX Lion How to do a Clean Install - Duration: 9:53. Related Posts 8 Tips & Tricks for Optimum Performance of Microsoft Outlook MS Outlook is one Ankur • September 12, 2014 3 Steps to remove duplicated email messages in Outlook 2016

Reply Jak says: January 29, 2015 at 5:37 pm Much appreciation! I love you so much Reply Leave a Reply Click here to cancel reply. 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.