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Mac Lion Disk Erase Failed Could Not Unmount Disk

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Worked perfectly after many failed "solutions". will operate on all partitions of that disk, and will do so whether a whole disk or a partition was specified.But still when I want to remove bootcamp or Macintosh HD You should see some disks appear like /dev/disk0, /dev/disk1, /dev/disk2. Using the above command can interrupt file read/writes, which can cause file corruption. check over here

thank you so much. 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) Here is how you should proceed 1) Download Stellar Partition Manager. For the boot drive, it shouldn't matter which version of OS X it's for (assuming 10.7, 10.8, and 10.9 at least), the only requirement is that it has Disk Utility - http://technology.siprep.org/fix-for-disk-erase-failed-couldnt-unmount-disk/

Volume Erase Failed With The Error Couldn't Open Disk

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 Vishal February 5, 2016 Hi Tanya, Hopefully you are trying to refer USB boot drive. Reply Monish d kothari says: September 13, 2015 at 6:17 am For people unable to boot from other disk ( elaborated method) : * Download the OS X firmware form App In a moment of "what the heck, try this," while in Disk Recovery mode, I ran Fix Disk Permissions, then, voila!

Fixing Disk Utility Errors via Recovery Partition If the Unable to Unmount Error is triggered by first aid or formatting a non-boot partition, you may be able to fix the error Loves Crystal Palace FC Share this online Facebook Twitter LinkedIn Reddit Google++ E-Mail+ Responses (11) Crystal M. 5th August 2015 at 3:54 pm · Reply After installing an update, I couldn't Ekle Bu videoyu daha sonra tekrar izlemek mi istiyorsunuz? Can't Unmount Disk Mac I really can't afford to pay someone $300 when I'm this close!

Enter your admin password if prompted. Ignatius College Prep Tech Blog Proudly powered by WordPress Twitter Facebook LinkedIn YouTube Book a Repair Book a Course 020 8660 9999 - [email protected] Home Xmas 2016 Repairs iPhone repairs Mac I tried this but it still didn't work, it says "unable to unmount 1 or more part" or something like that. http://www.stellarinfo.com/blog/couldnt-unmount-disk-error-mac/ It may take a long, long time.

Are you booted from the Recovery HD partition? Couldn't Unmount Disk External Hard Drive j.laskari! Reply With Quote 07-19-2016,12:31 PM #4 IWT View Profile View Forum Posts Member Since Jan 23, 2009 Location Born in Scotland, Worked in Scotland then England, Now live in Wales Posts Reply Joel May 18, 2015 My Mac is single drive partitioned but I created another partition named "Mac HD2" to download Yosemite on it.

Disk Erase Failed Couldn't Open Device

But it allowed me to erase the Macintosh HD option.

To start viewing messages, select the forum that you want to visit from the selection below. Volume Erase Failed With The Error Couldn't Open Disk 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 Volume Erase Failed Couldn't Open Disk Do you know what might be causing this?

wt to do pls i need help .. check my blog Looks like it starts erasing, but then quits and says at least one volume could not be unmounted. Bu videoyu bir oynatma listesine eklemek için oturum açın. When you start the software select your Apple drive. Partition Failed With The Error Couldn't Unmount Disk

Ignatius College Prep Tech Blog SI's blog about technology Fix for disk erase failed couldn't unmount disk If you're trying on a Mac using Disk Utility to erase a hard drive Reply With Quote 07-19-2016,07:04 AM #2 IWT View Profile View Forum Posts Member Since Jan 23, 2009 Location Born in Scotland, Worked in Scotland then England, Now live in Wales Posts If you have used our method above to create a bootable installer, choose ‘Disk Utility' from the available menu. this content iMac 27 inch , iMac 21 inch, Macbook 15 inch, Macbook 13 inch.

Reply Vishal May 19, 2015 @Eugene. Error 69888 Couldn't Unmount Disk 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. This should unmount the drive so you can now do this:Install or Reinstall Mavericks, Lion/Mountain Lion from ScratchBe sure you backup your files to an external drive or second internal drive

Give it a shot: http://emsooriyabandara.blogspot.com/2014/11/solved-external-hard-drive-not-detected.html Reply Jaycie Turner says: December 11, 2015 at 12:06 pm Whenever I go to type the password, it has a round dot and won't let me

Using this bootable USB device we can boot (or start) a computer and perform data recovery or other tasks. Ignatius College Prep Tech Blog on Another opinionated guide to Munki manifestsAlan Siu on Absolute beginner's guide to setting up Munki (not monkey)Sam K on Absolute beginner's guide to setting up http://osxdaily.com/2014/12/14/reins...rnet-recovery/ Ian Ian Reply With Quote 07-20-2016,05:14 AM #5 defmuse View Profile View Forum Posts Visit Homepage Member Since Jul 19, 2016 Location Bombay, India Posts 4 Specs:MacBook Pro + iMac Couldn't Unmount Disk Operation Failed Any ideas?

Came across this and bingo, worked in seconds. With Boot Drive we mean that Operating system of a computer is burned (written) to a USB drive which makes it bootable. Apple Hardware Apple Desktops Apple Notebooks Apple TV Other Hardware and Peripherals Developer Playground iOS Development OS X - Development and Darwin « Previous Thread | Next Thread » Thread Information have a peek at these guys Reply joe says: May 4, 2016 at 5:58 am Thank you!

Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the disk). Reply Vishal May 18, 2015 Hi Joel, I am going to help you resolve your issue. Lütfen daha sonra yeniden deneyin. 19 May 2016 tarihinde yayınlandıTechnicalconfessions.comThis video show an alternative way to reformat and erase your SD drive when you receive the following error within the disk Reply Leave a Reply Cancel reply Your email address will not be published.