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Disk Erase Failed Error Could Not Unmount Disk

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Thanks in advance. Please reload CAPTCHA. 6 − 1 = Notify me of followup comments via e-mail. When you Mac boots with the DVD, you can select your Macintosh HD and press :DELETE: icon from the software menu. I was an idiot and renamed my home folder and now I'm trying to format my computer because it doesn't recognize me or my password so not only can I not navigate here

Transcript The interactive transcript could not be loaded. First, figure out your password. 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 Search for: Search Recent Posts Another no-image workflow with Munki and Packages Script "Restrict changing networks to administrators only" on macOS Can't paste from Google Docs to Microsoft Word on Mac have a peek here

Volume Erase Failed Couldn't Open Disk

It involves restarting my MacBook, holding down Command+R, going to disk utilities, and using that to erase my hard drive However, when I try to erase my drive, this error message 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 This should force unmount the volume: 3) Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk' error. (For example to Erase/Partition the disk). To create bootable media and accomplish the task you need to register the software through Stellar Partition Manager Buy Now Page.

Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. I simply selected it and formatted it and voila! I keep coming up with the error message "Disk Erase failed with the error: Couldn't unmount disk." Any suggestions? Couldn't Unmount Disk External Hard Drive You should not physically unplug the drive.

http://www.stellarinfo.com/blog/repair-mac-hfs-hard-drive/ Hope this helps. Once done, you Mac will start with Yosemite and your disk drive now becomes singe partitioned. Now, press the opt n reboot your system 6. 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

Level 1 (2 points) Jan 21, 2014 3:21 PM in response to Dr.Mac. #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *2.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_HFS Erase Process Has Failed. Press Done To Continue He has successfully recovered number of Mac hard drives, failed drives and even unmounted drives. My Specs are MacBook Pro 2012 4GB 1TB. Please tell me what should I do now?

Partition Failed With The Error Couldn't Unmount Disk

It was a no go though Jan 21, 2014 2:11 PM Helpful (0) Reply options Link to this post by Kappy, Kappy Jan 21, 2014 2:17 PM in response to studio_ Reply Joel May 18, 2015 My Mac is single drive partitioned but I created another partition named "Mac HD2" to download Yosemite on it. Volume Erase Failed Couldn't Open Disk Enter your admin password if prompted. Disk Erase Failed With The Error Couldn't Open Device So now yor saying open mac by pressing said key.

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. check over here Stellar Partition Manager doesn't resize EXFAT partitions. Please take a look here: Why and how are some answers deleted? –bummi Apr 22 '15 at 20:41 add a comment| up vote 0 down vote Before you trash your drive, But now I am getting following error while trying to erase or paritition primary internal HD: "wiping volume data to prevent future accidental probing failed". Error 69888 Couldn't Unmount Disk

Im having the exact same issue.. –user88264 Aug 20 '14 at 12:37 add a comment| 6 Answers 6 active oldest votes up vote 10 down vote I found this worked perfectly Launch up Terminal.app (through /Applications/Utilities or through a Spotlight search). Have an external hard drive, which i used to boot up the iMac with el capitan, but i am still in the process of trying to erase the internal drive. http://strobelfilms.com/unmount-disk/disk-erase-failed-error-could-not-unmount-disk-lion.html Amsys will not compensate you in any way whatsoever if you ever happen to suffer a loss/inconvenience/damage because of/while making use of information in this blog.

Loading... Can't Unmount Disk Mac Reply Vishal November 20, 2015 Hi Sam, To enjoy full features of the Stellar Partition Manager software you need to register the product by purchasing it from the website. I will be linking this solution to other forums in the future.

share|improve this answer answered Jan 26 at 16:40 tim 1012 add a comment| up vote 0 down vote The only solution for me was to format this USB drive on Windows.

I need to get this one fixed and get the internal one running again, because i can't have two computers running off one external drive, and i still need to fix However, this is not applicable for the modification of the boot disk with the help of partitions or formatting. Enter the following where ‘MacintoshHD' is the name of the newly created Mac formatted partition, and where ‘x' is your disk identifier, (remember to use the ‘diskutil list' command if you At Least One Volume Could Not Be Unmounted The following steps can do the fixing: The USB boot drive is attached to the Mac, and the system is rebooted The OPTION key is held during the booting and then

Yes, add me to your mailing list. Browse other questions tagged hard-drive disk-utility or ask your own question. Also, the Quick Format didn't seem to work, I had to performa a standard format who took very long. weblink asked 3 years ago viewed 95067 times active 2 months ago Upcoming Events It's the season to ask about recommendations - do it well, please.

Jan 21, 2014 2:17 PM Helpful (2) Reply options Link to this post by Dr.Mac., Dr.Mac. Disk Utility gives you options to secure delete the partitions and hard drives. Please give me some suitable solution so that I can further use my MacBook Pro. 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.

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 Otherwise, we follow the steps: The Mac is rebooted, with the OPTION key being held down and the Recovery Partition is chosen The Disk Utility is chosen from the Boot Menu Using the above command can interrupt file read/writes, which can cause file corruption. Used diskmaker x to make an el capital boot disk then followed your steps and it worked on my 2013 MacBook Pro with Yosemite version.

We're trying to find the best answers and those answers will provide info as to why they're the best. I have rebooted a few times, and spent days running everything from TechTool Pro on it and it won't go. $ diskutil list disk2 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: HELP!0Disk Utility Weirdness: Macintosh HD Cannot Be Repaired But Then Has No Problems?0Hard disk doesn't show on boot after erasing with Disk Utility1OS X can't unmount disk0Messed up 1TB Fusion Drive Running Mavericks I am running Mavericks OX 10.9.1 and am trying to erase an external hard drive that has been partioned.

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 Graham 22nd June 2016 at 3:33 pm · Reply Thanks Man,, managed to force unmount a drive offline and run a repair 😀 Leave a reply Cancel reply Your email address Reply vishal May 25, 2016 Hi Dina, You can use Stellar Partition Manager Software to format the hard-drive of your Mac OS X extended Journaled file system. Tried again with internal osx drive and still won't recognized 2nd drive.

Can it be any usb? from there i booted the iMac on its original OS X lion and from there downloaded the public beta of mac os sierra, which i was supposed to in the first I am running OS X Yosemite 10.10.5 Reply Miguel Starkey March 7, 2016 How should I access my external hard drive partition which is unmountd on OS X El Capitan