Following this, attempt to Erase/Partition the drive again in Disk Utility. Im just happy i didn't have any files on the computers, so nothing was lost, just my time it took to fix them. Please try again later. Purchased new HD and it initially recognized disk when formatting. http://gsbook.org/unmount-disk/disk-utility-erase-error-could-not-unmount-disk.php
Would your software resolve this issue? Follow his post to know more about data recovery and Mac backups. Reply Del Rey says: December 3, 2016 at 6:45 pm Worked for me reformatting a Seagate Backup plus to use with OS 10.6.8. Scales July 15, 2016 Couldn’t get around this problem until I found the solution mentioned by you.
Couldn't repair, said to reformat, but couldn't erase anything either. Alysha S. 9th August 2015 at 7:12 pm · Reply I've got mine booted into a Yosemite installation USB. Sign in to make your opinion count. But, whenever I try to repair my hard drive, it gives me an error message, “Couldn't unmount disk”.
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 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 If you have an image you would like to clone to it use the clone option. Volume Erase Failed Couldn't Open Disk Reply marita says: January 26, 2016 at 2:48 pm What to do when the problem happens when i am trying to erase the internal hard drive to sell my pac book
Sign in Transcript Statistics 78,074 views 146 Like this video? Just keep typing your password and then hit Enter when you're done. Jan 1st December 2015 at 10:14 pm · Reply For me it worked finally quite simpel, first I unmounted the logical disc "under" the physical disk0, then the erase for disk0 Reply cookie says: January 13, 2016 at 1:21 am Thank you for the auspicious writeup.
Every message from you in this thread says something different. Disk Erase Failed With The Error Couldn't Open Device So now yor saying open mac by pressing said key. However, since you are erasing the drive anyway, this doesn't really matter in your situation. I've never seen that.
This site is not affiliated with or endorsed by Apple Inc. http://gsbook.org/unmount-disk/error-could-not-unmount-disk-disk-utility-mac.php wt to do pls i need help .. HBT 92,353 views 4:34 How to Erase or Partition a Drive in Mac OSX - Duration: 6:50. Up next How to force a Hard Drive to unmount for formatting in Mac OS X Disk Utility - Duration: 6:11. Couldn't Unmount Disk External Hard Drive
To create bootable media and accomplish the task you need to register the software through Stellar Partition Manager Buy Now Page. 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 Retox Media 16,568 views 2:29 How To Remove PASSWORD on MacBook Pro | All Macs! | Unlock Passcode for Pro Air iMac Mac Pro - Duration: 4:09. check my blog Is there a way in Terminal to do this instead?
Sign in to make your opinion count. Force Unmount Mac You can try booting from OS X Recovery (by holding ‘CMD' + ‘R' keys at startup) or an external drive and use the command line to attempt to unmount or erase Crazy 8s Code Golf Why did Tarkin undertake this course of action at the end of Rogue One?
Use Disk Utility<
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 » Tried again with internal osx drive and still won't recognized 2nd drive. 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 news Operation failed… Reply Alan Siu says: August 17, 2016 at 12:59 pm Based on the output you posted, your disk might have unmounted just fine.
Sign in Share More Report Need to report the video? You must boot from another physical device. Retox Media 3,138 views 2:30 Terminal: Mount & UnMount Disc Images - Duration: 4:13. Same goes when I try to erase the disk.
If the internal drive is causing the issue because the OS X Recovery exists as a partition on the physical disk, unable to modify or unmount the internal drive, then the Took a lot of time to find it but was a flawless solution. This feature is not available right now. If you have created your own bootable drive with a full system, open Disk Utility from /Applications/Utilities.
Reply Adrie says: October 14, 2016 at 10:39 am Great answer. Sign in 3 8 Don't like this video? Reply Jak says: January 29, 2015 at 5:37 pm Much appreciation! Required fields are marked *Comment Name * Email * Website Post navigation Previous Previous post: Running sudo commands in AutomatorNext Next post: How many times do you have to write zeros
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 Sign in to add this video to a playlist. Geekanoids 166,323 views 9:53 How to Format An External Hard Drive for Mac - Duration: 5:16. Andy Slye 52,271 views 4:20 Quick Tip: Solving "Read Only" External Drive Problems on Your Mac - Duration: 4:47.
Apr 22, 2012 4:52 AM Helpful (0) Reply options Link to this post by goldish, goldish Apr 24, 2012 2:03 PM in response to Linc Davis Level 1 (0 points) Apr