Reply Nicola says: July 26, 2016 at 4:43 pm Thank you!! 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. I ran Disk utility repair disk but it gave me back this message ‘Disk Utility can’t repair this disk. sudo /usr/sbin/diskutil unmountDisk force /dev/disk2 Reply Ashley says: June 25, 2016 at 4:20 pm Came across this same problem after my MacBook Pro freezes after logging in and won't go to have a peek here
If yes, then go to OS X utilities and format the entire hard disk drive. share|improve this answer edited May 5 '15 at 20:27 answered May 5 '15 at 18:09 Buscar웃 25.5k42580 hdiutil: couldn't unmount "disk0" - Resource busy –Chris May 5 '15 at To comment on this article and other Macworld content, visit our Facebook page or our Twitter feed. ends in 3 days Linked 3 Can't erase unmountable external HD Related 0Partition issues after deleting Core Storage Logical Volume Group.
He has successfully recovered number of Mac hard drives, failed drives and even unmounted drives. Reply Jeff Alexander says: April 15, 2016 at 3:18 pm I have been trying off and on for weeks to get rid of this error. NOTE: Use of the ‘sudo' command may not be necessary for some of these actions, however, as long as you know the administrator account's password, starting any unix command with ‘sudo' If you have created your own bootable drive with a full system, open Disk Utility from /Applications/Utilities.
This feature is not available right now. This should then allow you to partition and work with the physical disk again. 1) Using the Terminal application again, booting from OS X Recovery or an external bootable drive. Zognoh 806,136 views 3:28 Reset Mac to Factory State and Delete Personal Data Securely - Duration: 2:57. Couldn't Unmount Disk Mac Seems your hard drive is corrupt and beyond the repair of Disk Utility.
So the first thing to do is to startup the Mac from another bootable drive such as an external drive or OS X Recovery. Disk Utility Couldn't Unmount Disk External Hard Drive I did Google your error, and came across this workaround. Reply Sam November 19, 2015 Hi Vishal, To resize my Mac startup disk, I am searching for the Stellar Partition Manager Registration key but unable to find any suitable http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/ When hiking, why is the right of way given to people going up?
Then select the desired external drive from the startup manager screen and press the enter key. Force Unmount Mac Free recovery apps aren't reliable and won't give you the desired recovery results. Please tell me how I can get the Registration key of Stellar Partition Manager Software? So I found this page and tried everything.
Normally, any ‘Couldn’t Unmount Disk' error is attributed to circumstances where the boot drive is being modified or is being used by an application or process. Can't Unmount Disk Mac Reply Sheryl Brown March 7, 2016 I must Thank You for resolving mu issues. At Least One Volume Could Not Be Unmounted But, the important point to remember is that the installer or the recovery drive must reside in the drive, separate from the primary boot disk with the installed OS on it.
Comments(34) Mabaker May 13, 2015 My Disk Utility is unable to resize Macintosh HD. navigate here Reply Andrés says: March 31, 2016 at 6:00 am Thank you very much!!!!! Replace the ? I'm not a technology person? Error 69888 Couldn't Unmount Disk
Typically the "Couldn't Unmount Disk" error pops up when the currently boot drive is being modified, thus the easiest solution is to boot from another drive and run Disk Utility from So much easier and clearer than anything else I read. Thanks! http://jessriegel.com/unmount-disk/mac-lion-disk-erase-failed-could-not-unmount-disk.html Therefore, a bootable thumb drive was a good option.
Thanks so much for the quick and easy tip. Partition Failed With The Error Couldn't Unmount Disk Reply joe says: May 4, 2016 at 5:58 am Thank you! Finally, you will be able to format your Mac Hd in disk utility I hope the solution will be helpful for you.
Is すごく怖 bad, or good? Easy Steps 14,351 views 4:05 How to reset your MacBook Pro to Factory Settings without Installation Discs - Duration: 3:28. Jul 18, 2012 12:03 PM Helpful (0) Reply options Link to this post by Victoria Herring, Victoria Herring Jul 18, 2012 12:53 PM in response to Victoria Herring Level 2 (301 Volume Erase Failed Couldn't Open Disk You may have to still change the number (it may not be /dev/disk2 but /dev/disk3 or something else), but most terminal "command not found" errors I've seen have been due to
Browse other questions tagged macos hard-drive disk-utility or ask your own question. Reply uzz says: July 21, 2016 at 1:05 pm You don't need any boot drive nor recovery partition utility to fix this error. Sign in to report inappropriate content. http://jessriegel.com/unmount-disk/mac-repairing-disk-failed-with-error-could-not-unmount-disk.html For this example, let's say it's /dev/disk2.
armineprox 343,373 views 4:33 How to reset your MacBook Pro to Factory Settings without Installation Discs - Duration: 3:28. Such boot drives are easy to create on your own, here are instructions for making boot disks for OS X 10.9, OS X 10.8, and OS X 10.7. Reproduction without explicit permission is prohibited. Look complicqted to far added agreeable from you!
Worked for me this morning. I was an idiot and renamed my home folder and now I'm trying to format my computer because it doesn't recognize me or my password so not only can I not This feature has been tested using OS X v10.9.2 which was the latest Mac OS release at the time of writing. However, this is not applicable for the modification of the boot disk with the help of partitions or formatting.
theComputerGuru 198,114 views 5:29 Disk utility repair disk error - Duration: 7:11. 121macfreak 76,199 views 7:11 HOW TO: Delete a partition on Mac - Duration: 1:29.