If you have an external bootable disk, connect this to your Mac and power your Mac up whilst holding down the OPTION/ALT key. asked 1 year ago viewed 6351 times active 2 months ago Upcoming Events It's the season to ask about recommendations - do it well, please. Yükleniyor... Reply Jason says: November 5, 2015 at 8:50 am I tried this method, but now it says "Forced unmount of disk2 failed: at least one volume could not be unmounted" Please http://gsbook.org/unmount-disk/mac-repairing-disk-failed-with-error-could-not-unmount-disk.php
Any help is greatly appreciated. –Ab'initio Jun 9 at 10:42 @Ab'initio This should be a separate question rather than a comment. Or if you have any other files open that came pre-installed on the drive, close them. Reply Dina B. Stellar Phoenix Mac data recovery is free-to-preview software that allows preview of deleted, formatted and lost files in demo version. http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/
Reply cookie says: January 13, 2016 at 1:21 am Thank you for the auspicious writeup. Reply chris says: December 8, 2016 at 12:13 pm it still fails disc erase in utility, this drive is almost brand new, it's hardly been used, is there anything else I The solution lies only in using a separate USB drive for fixing the error.
Then select the desired external drive from the startup manager screen and press the enter key. You must be aware of USB which stands for Universal Serial Bus and it is used to support data transfer between two devices. Formatting the HD will have recreated the new file structure on your hard drive and ‘Couldn't unmounts disk’ will also resolve. Error 69888 Couldn't Unmount Disk For older Macs running prior versions of OS X, typically anything running OS X 10.6 or earlier will have a SuperDrive, and thus shipped with a bootable DVD that can serve
WhyNotVideo211 46.082 görüntüleme 4:57 How to ║ Restore Reset a Macbook A1278 to Factory Settings ║ Mac OS X - Süre: 3:58. Volume Erase Failed Couldn't Unmount Disk Press Ctrl+C to abort execution of the last command in a minute (it's enough to just fill the beginning of the disk with random garbage). Thank You! http://osxdaily.com/2013/06/14/resolve-a-couldnt-unmount-disk-error-in-disk-utility/ Success!
Target mode gave me the same error that the disc could not be unmounted Sep 23, 2011 4:41 PM Helpful (0) Reply options Link to this post by dmdimon, dmdimon Sep Volume Erase Failed Couldn't Open Disk An external drive or a network drive is preferred if it is the internal hard drive you have an issue with, since the OS X Recovery is a partition on the Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Why do Latin nouns (like cena, -ae) include two forms?
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When you Mac boots with the DVD, you can select your Macintosh HD and press :DELETE: icon from the software menu. Disk Utility Couldn't Unmount Disk External Hard Drive Reply Alan Siu says: January 26, 2016 at 4:49 pm Try booting into recovery mode (holding down Cmd-R during bootup) and then erasing it from there. Partition Failed With The Error Couldn't Unmount Disk Tuts+ Computer Skills 11.813 görüntüleme 2:53 Partition failed with error | How to unlock Password Protected Hard Drive | HD busy encrypting - Süre: 4:05.
Junaid Rupani 878.158 görüntüleme 6:06 Disk erase failed couldn't unmount disk - Süre: 0:44. Check This Out share|improve this answer answered Oct 6 at 22:42 Thomas Patrick Esch 111 this worked because I was trying to unmount the disk while I was in the disk (dooh). I searched high and low and your directions were the easiest to follow and actually worked!! why do they give the same output? Can't Unmount Disk Mac
For older Macs running prior versions of OS X, typically anything running OS X 10.6 or earlier will have a SuperDrive, and thus shipped with a bootable DVD that can serve Step 3: Select the Mac volume to be recovered by clicking on either “Volume recovery” or “formatted recovery” option for best Partition Failed Could Not Unmount Disk solution. Worked like a charm for me to reformat an external drive. 100x easier than the other ways I read to solve the unmount issue, like boot disks, etc. http://gsbook.org/unmount-disk/disk-utility-erase-error-could-not-unmount-disk.php Select the ‘First Aid' tab and verify the troublesome disk, repairing if needed.
It worked the 1st time for me, and i also had to stumble across the interweb minefield before finding this solution. Disk Erase Failed With The Error Couldn't Open Device This site is not affiliated with or endorsed by Apple Inc. Could aliens colonize Earth without realizing humans are people too?
For this example, let's say it's /dev/disk2. Parents disagree on type of music for toddler's listening Does Wand of the War Mage apply to spells cast from other magic items? Home Mac OS X iPhone iPad Tips & Tricks Jailbreak News iOS Resolve a "Couldn't Unmount Disk" Error in Disk Utility Jun 14, 2013 - 15 Comments Disk Utility usually works At Least One Volume Could Not Be Unmounted In order to avoid Partition Failed Could Not Unmount Disk situation and keep all Mac files safe and secure, following tips might prove to be helpful.
Formatting the hard drive or partition scheme will recreate new HFS file structure on the hard drive, which will be free from cryptic errors. In a moment of "what the heck, try this," while in Disk Recovery mode, I ran Fix Disk Permissions, then, voila! Otherwise use format and choose HFS+ plug the hard drive into your Mac again and it should format no problem. http://gsbook.org/unmount-disk/error-could-not-unmount-disk-disk-utility-mac.php Reply Alan Siu says: December 5, 2016 at 11:22 am If it successfully unmounts the volumes, the volumes are unmounted and thus should not show up in Finder.
Why did Sansa refuse to leave with Sandor Cleagane (Hound) during the Battle of Blackwater? About The Author Vishal Vishal is a Mac data recovery expert at Stellarinfo.Com. Wife Works in LA. George W. 4th November 2015 at 1:16 pm · Reply >Alysha S. (9th August 2015 at 7:12 pm) >I’ve got mine booted into a Yosemite installation USB.
Kernel Panic issues: Like BSOD in Windows, Mac users might come across kernel Panic issues. Reproduction without explicit permission is prohibited. After the installer loads select your language and click on the Continue button. 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
What more, due to Partition Failed Could Not Unmount Disk issue, users also have to face some difficulties while accessing their hard drive files and other installed apps, which really presses I have my main disk partitioned, I could boot from Windows. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list.