Having struggled with Couldn't Unmount Disk for hours, I re-started my mac with cmd+r, opened terminal and unmounted disk. Stellar Partition Manager doesn't resize EXFAT partitions. WhyNotVideo211 46,082 views 4:57 How to restore MacBook pro - Duration: 6:06. Look complicqted to far added agreeable from you! http://gsbook.org/unmount-disk/mac-lion-partition-failed-could-not-unmount-disk.php
http://technology.siprep.org/fix-for-disk-erase-failed-couldnt-unmount-disk/ Reply Bobby says: October 9, 2015 at 5:17 pm Excellent post! Otherwise use format and choose HFS+ plug the hard drive into your Mac again and it should format no problem. You should now be able to erase the drive. This should force unmount the entire physical disk and all its related volumes: 3) Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the https://discussions.apple.com/thread/3894449?tstart=0
But, why to do so! Thank you! –gentmatt Oct 10 '12 at 17:24 Could you provide more details on the specific command you have in mind? –user8472 Oct 16 '12 at 7:25 add a Very smooth. Reply Scott says: February 12, 2016 at 1:43 pm Great tip.
Spent hours searching. Reply Sheryl Brown March 7, 2016 I must Thank You for resolving mu issues. Hope this helps. Error 69888 Couldn't Unmount Disk Fix couldn’t unmount error.
Thanks Reply John April 7, 2016 MacBook Pro 2011 2.2 GHz Intel Core i7 8GB 1600 MHz DDR3 OSX 10.9.5 I replaced my optical drive with an HDD Caddy Reply abdul rahaman says: February 23, 2015 at 12:04 pm I want to install couldn't Reply Gary Bridger says: June 1, 2015 at 3:25 pm Ok I guess I done this Restart your Mac system and reply to configuration prompt.
You will need any OS X boot drive to complete this task, I used a Mavericks boot installer drive for this purpose but others should work too, whether they are installation
Enter your email address below: Related articles: Dual Boot OS X 10.9 Mavericks and OS X 10.8How to Resolve a "Partition Failed" Error in Mac OS XHow to Verify (& Repair) Partition Failed Couldn't Unmount Disk External Hard Drive It's okay to mention an idea, but please excerpt it in the answer. From the listing, look in the Identifier column for your disk identifier. 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
I've tried to unmount through disk utility as well as through Terminal. http://www.amsys.co.uk/2014/05/disk-utility-tip-fix-couldnt-unmount-disk-errors/ COMMUNITY RULES Writing a Quality Post Reply With Quote 01-05-2015,11:57 AM #7 howardhonig View Profile View Forum Posts Member Since Nov 03, 2012 Posts 6 I plan on replacing the drive. Couldn't Unmount Disk External Hard Drive Open the disk untility and eras your disk normally - the error will be gone. Can't Unmount Disk Mac Unintentional Formatting: Pressing wrong button will sometime lead to emergence of very critical Partition Failed Could Not Unmount Disk problem.
Slow & sluggish behavior of Mac system The stored Mac file gets corrupted or damaged without any warning Installed programs gets crashed or freezes frequently The emergence of annoying error messages this page Reply Adrie says: October 14, 2016 at 10:39 am Great answer. You should also see the name of the disk such as ‘Macintosh HD'. It is the Utilities Menu for the Installer Disk Verification of the Disk is done with the “First Aid.” The repair is done The original task which was halted due to Volume Erase Failed Couldn't Open Disk
Reply Alysia March 15, 2016 I'm trying to format a new external hard drive and it is not working. Purchased new HD and it initially recognized disk when formatting. This will bring in the drive menu. 4) Select the newly created boot DVD from this option. get redirected here At this point I'm not sure what else to try.
armineprox 343,373 views 4:33 How to Format External Hard Drive for Mac OSX - Duration: 4:13. Disk Erase Failed With The Error Couldn't Open Device Further, the disk manager utility will allow the user to create, resize, add partitions on the hard drive with HFS, FAT or NTFS file systems. (2) Fixing with USB Boot Drive Keep it unmounted and then erase in Disk Utility.
Post navigation ← Macbook Boots to Blue Screen : Get Corrupted Deleted Mac Data Recovered iWorks Document Recovery : Get Corrupted Deleted Mac Data Recovered → Search for: Optimize & Fix Apr 24, 2012 7:05 AM Helpful (0) Reply options Link to this post by Linc Davis, Linc Davis Apr 24, 2012 2:36 PM in response to goldish Level 10 (208,098 points) To start viewing messages, select the forum that you want to visit from the selection below. Force Unmount Mac Reply Leave a Reply Cancel reply Your email address will not be published.
Please type your message and try again. goldish Level 1 (0 points) Q: Partition issue, couldn't unmount disk (error) Hi, I have a Mac that I put a partition Continuously press "C" button from your keyboard. 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, 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
This entry was posted in Mac Data Recovery and tagged Best Data Recovery Mac, Corrupted Mac Data File Recovery, Deleted text file recovery Mac, Partition Failed Could Not Unmount Disk on Note down the disk identifier. Open the command line and type the following: diskutil list (press enter to execute the command) You will see something like: 0: GUID_partition_scheme *8.0 GB disk1 Find your disk by size Thanks very much.