Using the above command can interrupt file read/writes, which can cause file corruption. MacBook Pro, Mac OS X (10.7.3) Posted on Apr 22, 2012 9:59 AM Reply I have this question too Q: Partition issue, couldn't unmount disk (error) Hide Question All replies Helpful Even after I tried your final option, I got this message: >Error: -69888: Couldn’t unmount disk Same here. Hope this helps. this content
Sign in to make your opinion count. 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 Using the above command can interrupt file read/writes, which can cause file corruption. 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. http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/
Required fields are marked * Prev Post Next Post Subscribe Sign up for news, views and offers and more from our expert team Popular posts Recent PostsMost CommentedMost ViewedOpenSSH updates in Name (required) Mail (will not be published) (required) Website « Grab the iOS 7 Default Wallpapers for iPhone & iPod touch Evolution of the iPhone & iOS Home Screen » Reply uzz says: July 21, 2016 at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. Loading...
We are now going to force erase the physical disk, creating a single Mac OS Extended (Journaled) volume. If you have used our method above to create a bootable installer, choose ‘Disk Utility' from the available menu. Thank you! Error 69888 Couldn't Unmount Disk Apr 27, 2012 2:28 AM Helpful (0) Reply options Link to this post by goldish, goldish Apr 27, 2012 9:29 AM in response to goldish Level 1 (0 points) Apr 27,
Then the resolution lies in the previous method. Can't Unmount Disk Mac Reply Vishal May 19, 2015 @Eugene. Reply Vishal May 13, 2015 To resize the Mac startup disk, you need to create bootable DVD. Soon, the next version will be doing all partitioning tasks on boot camp. [Update: June 2015: Stellar Partition Manager supports BootCamp partition] Reply Timothy May 21, 2015 My external
FOR AN ENTIRE PHYSICAL DISK: 1) Using the Terminal application again, booting from OS X Recovery or an external bootable drive. Disk Erase Failed With The Error Couldn't Open Device CellularProz 295,054 views 3:58 Disk erase failed couldn't unmount disk - Duration: 0:44. Reply chris says: December 1, 2016 at 3:14 pm I've done this procedure several times, it says it was successful: "Forced unmount of all volumes on disk2 was successful" but it's Skip to content St.
Required fields are marked *Name Email Website Time limit is exhausted. http://www.amsys.co.uk/2014/05/disk-utility-tip-fix-couldnt-unmount-disk-errors/ Cox 356,526 views 5:16 How to Erase or Partition a Drive in Mac OSX - Duration: 6:50. Couldn't Unmount Disk External Hard Drive http://technology.siprep.org/fix-for-disk-erase-failed-couldnt-unmount-disk/ Reply Bobby says: October 9, 2015 at 5:17 pm Excellent post! Partition Failed Couldn't Unmount Disk External Hard Drive Stellar Partition Manager doesn't resize EXFAT partitions.
You would have to boot from another device, such as a Time Machine backup drive, Lion Internet Recovery, or a USB drive prepared with Lion Recovery Disk Assistant. http://jessriegel.com/unmount-disk/mac-repairing-disk-failed-with-error-could-not-unmount-disk.html Is the form "double Dutch" still used? ITECHSTER 8,683 views 4:13 Mac : Factory reset / Fresh install ( OS X El Capitan ) - Duration: 5:21. Junaid Rupani 878,346 views 6:06 How to ║ Restore Reset a Macbook A1278 to Factory Settings ║ Mac OS X - Duration: 3:58. Volume Erase Failed Couldn't Open Disk
JrTech 768,739 views 4:09 How to Fix a Corrupt Mac Harddrive in 10.8 - Duration: 3:03. 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. Very smooth. have a peek at these guys You can read the following blog post on HFS drive corruption.
Comments(34) Mabaker May 13, 2015 My Disk Utility is unable to resize Macintosh HD. Force Unmount Mac Reply Tanya February 4, 2016 What is a USN boot drive? However, how could we be iin contact?
Now with the help of the Mouse pointer, drag the sidebar to resize your Mac HD 2 partition. Went back to disk utilities, erased it (this time it did not complain at all), re-installed OS. I am running iMac 2011 OS X 10.9. Usb Boot Drive Mac Sign in to make your opinion count.
Reply Alan Siu says: June 26, 2016 at 8:06 am The only thing I can think of is that you're accidentally typing it wrong. Reply TE says: March 26, 2016 at 9:59 am Couldn't get around this problem until I found your solution… Used diskmaker x to make an el capital boot disk then followed Reply Eugene May 19, 2015 Why the software is not showing my Boot Camp partition? check my blog The last command will prompt for password.
The fist step has worked perfectly. Working... I really can't afford to pay someone $300 when I'm this close! This will allow you to fix the problem, regardless of the cause, by one of two means, the first is a sure-thing to fix the issue, while the other only works
So now yor saying open mac by pressing said key. why do they give the same output? The version of the OS X does not matter, by at least must be 10.7, 10.8 and 10.9. Reply TE says: March 26, 2016 at 9:59 am Couldn't get around this problem until I found your solution… Used diskmaker x to make an el capital boot disk then followed
You should also see the name of the disk such as ‘Macintosh HD'. Explain why you think the answer you provided will solve the problem or is better than others out there. Reply Jon says: April 18, 2016 at 9:55 am When I try to do this I get an errror on the terminal saying Sudo command unknown… Any ideas? Regards.
Otherwise use format and choose HFS+ plug the hard drive into your Mac again and it should format no problem. Do you know what might be causing this? armineprox 343,373 views 4:33 How to Format External Hard Drive for Mac OSX - Duration: 4:13. Hope this helps.
Reply Alan Siu says: September 20, 2016 at 12:44 pm You really have to tackle one problem at a time. 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.