To start the conversation again, simply Step 3. How to Reinstall macOS After Erasing Your Drive, Solution #1: Erase your Disk via Terminal, Solution #3: Erase Selected Volumes Instead, Solution #4: Adjust the Security Levels for Formatting an External Device, Solution #7: Forcibly Unmount a Disk via Terminal, 1. Unable to download OSX or erase reformat do anything. Refunds. provided; every potential issue may involve several factors not detailed in the conversations only. When finished you can quit out of Terminal as usual. I meant to say Yosemite is the macOS in question!! See more information about Outbyte and uninstall instructions. Now, select the external device from the sidebar and click on the Erase button. This will display detailed information regarding various disks and volumes in your Mac. Continue with your plan if it does. im re-initiating installation now to get that error prompt again. Step #2. Im sorry. This significantly limits your abilities, so we will describe the best ways to fix that error message in this article. duncantho, Unable to delete partitions on mac using diskUtility. Here are some suggestions that you can implement to fix the Disk Utility erase process has failed error. If you're using macOS Mojave or earlier, chooseApple menu > System Preferences, click iCloud, then click Sign Out. If you want, you can go to the dropdown menu from the top-left corner to view all volumes and devices. If malware has corrupted your Mac, then you easily fix it by formatting the disk. Vic manages our website to ensure that our readers have a seamless experience while browsing. Step 2. June 9th, 2022 Summary: Getting a message "couldn't unmount disk" means that you won't be able to erase, partition, reformat or do any other actions with the drive. Helpful. There can be different reasons for formatting a hard drive or an external device on Mac. Format it as APFS and name it "Macintosh HD". After that, just wait for the commands to process as your selected disk would be formatted in the supported file system. If prompted, enter the administrator password. The good news is that there's several troubleshooting tips you can do to fix this issue. Learn how to back up your Mac. Such boot drives are easy to create on your own, here are instructions for making boot disks for OS X 10.9, OS X 10.8, and OS X 10.7. In this way, you can be sure whether the problem is with the entire disk or selected volumes. For example, a file from the disk you are trying to erase could be open, which means that you cant proceed with the erasing unless all the files are closed. The Erase process has failed error on Mac is troublesome because users cant access their hard drive files and apps unless the issue has been fixed. Step 2: A boot menu will appear, here, select to choose "Disk Utility". Select Disk Utility from the window. 1000 N West St, Wilmington, DE 19801, United States. Erase your hard drive and reinstall macOS. I get the following error message - Erase process failed. Another method uses the command line to force unmount a disk, but this is not the top recommended option because of potential for data loss. It's a special APFS container that contains a copy of macOS Recovery, which is what you're currently running from. Get started with your Apple ID. Then, reinstall macOS. Select the partition you wish to remove then click on the, This site contains user submitted content, comments and opinions and is for informational purposes When you have your identifier use the . Step 2. My brother gave me his old iMac (24 early 2009 running on El Capitan). If you are getting the Disk Utility to erase the process has failed error while formatting an external device, then you should follow this drill. 1-800-MY-APPLE, or, Sales and If you dont make any mistakes and there are no issues with your system, then you will not encounter the Mac Disk Utility erase process has failed issue. So it set up. The application has one of the highest data recovery rates and can be used in the following way: Firstly, launch the Recoverit Data Recovery application on your Mac by visiting its Finder > Applications. thank you for your patience. Looks like no ones replied in a while. last question: should I only have 212GB available out of 245? How to Fix the Couldnt Unmount Disk Error on Mac. Sep 27, 2021 11:31 AM in response to rchaserfour. Now, from its home, you can just select a location to scan. Also, this error can occur if different other programs are using the USB drive. Either make the encryption in FileVault to continue the progress which didn't work after reading about it and trying things or to erase the HD and start a new install from my Time Machine backup. There are various reasons behind the emergence of Mac Terminal Error 69888 creating panic situation. Sep 27, 2021 10:39 AM in response to Encryptor5000. Do you have an external drive you can install to, Erase fails. What Causes the Couldnt Unmount Disk Error in Disk Utility for Mac? Connect the external storage device to the Mac and launch the Disk Utility application. Some of them can be as follows: It doesn't matter what your reason for formatting a hard drive or external device is the process is extremely easy. ", Drive Partition and Format - El Capitan or Later, Dec 12, 2018 12:03 PM in response to Kappy. ask a new question. I tried to install the new MAC OS but it give me an error too. it doesn't unmount disk, Please see this, this is a 2015 MacbookPro. Best answer Kappy Level 10 361,679 points Boot from your USB bootable drive. 19 I am willing to dual-boot my MacBook Pro (13-inch, Early 2011) macOS Sierra to install Ubuntu. captured in an electronic forum and Apple can therefore provide no guarantee as to the efficacy of Can you take a screenshot of the error that you got when reinstalling macOS? Let me know if that works. Ask Different is a question and answer site for power users of Apple hardware and software. In this way, you can check whether the issue is with a selected volume or not. The length of time First Aid takes to run depends on the size of your drive, how much data is on it, and how many errors need fixing. You might wish to troubleshoot an issue by formatting the hard disk. Keep holding both keys until you see an Apple logo or hear a startup sound. Launch Disk Utility and select the disk you are trying to erase (if you can't see it in the sidebar, click the View menu and choose Show all Devices). From here, you can just adjust the security level for formatting the external device. The Disk Utility is one of the apps every Mac can run, even when the system is not booting properly. Repeat that and sudo fuser -c /dev/disk2s2 to kill or quit any processes that are blocking the eject. Home Mac How to Deal with Erase process has failed Error on Mac. rkaufmann87, call I suddenly deleted SSD and i wanted to install Big Sur again a couple hours ago. Declutter your system by cleaning up your computer with a. Connect the USB boot drive to your Mac, then reboot. I am having the same issue - did you manage to resolve and clear data? Although to format the disk via Macs graphic user interface, the following steps can be taken. We use cookies to make your experience better. When you login first time using a Social Login button, we collect your account public profile information shared by Social Login provider, based on your privacy settings. Follow the on-screen instructions to finish the installation process. Firstly, go to your Mac's Finder > Applications > Utility and launch the Disk Utility application on your system. Is there a way past this roadblock? Trying to erase my 2015 iMac before I give it to a family member. couldnt open device .. (-69877) Thank you. While the problem is not that common, chances are that you might also get the Disk Utility Erase Process has failed error on your Mac. Is there a way to keep the versatile bonus while mounted, like a feat or anything? Big stress reducer. Turn off your Mac completely. Click Done to continue. This site is not affiliated with or endorsed by Apple Inc. in any way. (My newer Mac is the one running Mojave! All postings and use of the content on this site are subject to the. You should back up your Mac before trying to erase or reformat it. What is the Couldnt Unmount Disk Error on Mac? Download and try Outbyte MacAries right now to see what it can do for your Mac. The best way torestore your Mac to factory settings is toeraseyour hard drive and reinstall macOS. What makes this error frustrating is that there is usually very little to no additional information provided by the error message, making it more challenging to resolve the problem, And based on the error message, it is even harder to determine what the problem is all about. Looks like no ones replied in a while. Ideally, if the security level for the USB drive or the external hard disk is too high, then the Disk Utility might not be able to successfully format it. I did not set it up. As you can see, I have listed different tried-and-tested solutions for the "Erase Process has Failed" error on Mac that you can implement. DU tries erasing, then tells me "Erase process has failed. He excels in troubleshooting errors and resolving Windows issues for gaming and work purposes. A Volume is the partition or section of a drive you store data in. Delete any malicious software detected using your antivirus and delete all related files. Once the Terminal application is opened, just type the command diskutil list and press return. From here, please note the identifier of the disk you wish to format (like disk2 or disk1). It only takes a minute to sign up. Not sure what the first error was about. https://softwaretested.com/author/vicrey/. You can take the assistance of Wondershare Recoverit, which is an extremely reliable data recovery application, supporting all the major macOS versions. He creates content that educates and helps users with their tech-related questions. It worked! I have a late 2014 Mac Mini. When you login first time using a Social Login button, we collect your account public profile information shared by Social Login provider, based on your privacy settings. Why is Your Mac Getting the Couldnt Unmount Disk Error and How to Fix It? Once your disk has been verified, you can then proceed with the task you were trying to perform when the error occurred. When a malicious software is running in the background and wreaking havoc on your Mac, you might get the Couldnt Unmount Disk error when you try to do something with your hard drive. It is a cleaner approach to erase a disk and would help you meet your requirements easily. Enter a name for the formatted hard drive. Now, just select a volume from the sidebar (instead of the entire disk) and click on the Erase button on the toolbar to format it. Apr 10, 2023 Filed to: Solve Mac Problems Proven solutions. Another possible reason is the presence of malware. any proposed solutions on the community forums. Similarly, you can try to erase the entire disk as well to further diagnose the problem. Disable your security software after running the scan because it might prevent the processes from pushing through. After Disk Utility loads select the drive (out-dented entry with the mfgr.'s ID and size) from the side list. We also get your email address to automatically create an account for you in our website. Hardware or software issue: It is also a common factor that is quite responsible for Mac file corruption and in a lieu emergence of erroneous situations. Learn more about resetting NVRAM or PRAM. I restart in recovery mode using command+R; select Disk Utility; select the internal disk; press erase; and it fails, saying it can't unmount the disk. Sep 14, 2020 6:33 PM in response to peht66, Sep 19, 2020 2:59 PM in response to BDAqua. Once the Terminal application is opened, just type the command "diskutil list" and press return. When this happens, simply follow the solutions listed above and youll be good to go. Run First Aid on any problematic drives. Open Disk Utility and select the drive you want to erase from the sidebar. Therefore, you can consider formatting selected volumes of the disk instead. It looks like you have an M1 Mac. Other factors you should look into include corrupted system files, bad hard drive sectors, or insufficient permissions. When in Disk utility and pressing erase for the main internal it wont do it and pop up says couldnt in mount disk!!? Technicalconfessions.comThis video show an alternative way to reformat and erase your SD drive when you receive the following error within the disk utility G. Select the storage device (not the partition) and click the "Erase" button at the top of the window. VPN vs Proxy - The Differences Explained! document.querySelector('#copyright-year').outerHTML = new Date().getFullYear() As you know, Disk Utility is responsible to run formatting and erasing operations on the disk. rev2023.6.23.43509. Solution #1: Use a USB Boot Drive to Repair the Hard Drive. Sep 14, 2020 2:11 PM in response to Kenanddebbie. Whatever I do, I keep on ending up with the message 'Disc erase failed couldn't unmount disc' I am currently in grey screen with OSX Utilities and internet access only. Thank you! You should see the device names for each of your drives appear in the sidebar. Deleting volume Recommended by experts, it will let you get back all kinds of data from different sources on your Mac without any hassle. What Causes Erase process has failed Error on Mac? VPN vs Proxy - The Differences Explained! Whenever I tried that, my computer would receive the spinning wheel of doom, and stay like that for hours. They require the following two partitions to always exist. Learn more about Stack Overflow the company, and our products. Refunds, This site contains user submitted content, comments and opinions and is for informational purposes I thought my last actions further messed up my situation. Apple_APFS_iSC: This is the first 524 MB partition (disk0s1) on the internal drive. provided; every potential issue may involve several factors not detailed in the conversations User profile for user: From the menu bar at the top of the screen or iTunes window, choose Account >Authorizations > Deauthorize This Computer. To adjust its security level and fix the erase process has failed on Mac, follow these steps: Step 1. When you run First Aid, it scans the entire disk for errors and lets you know if there are any it cant repair. Throwing away the script on testing (Ep. But it is throwing an error. Apple may provide or recommend responses as a possible solution based on the information The details say: The volume "Macintosh HD" on disk2s5 couldn't be unmounted because it is in use by process 655 (kextcache) I just received a used Mac Mini that had belonged to my aunt. Since there could be various reasons for getting the erase process has failed error on Mac, you might look for different ways to fix it. Recovery Mode is a special partition on your Mac you can use to restore from a backup, reinstall macOS, get online support, or erase your startup disk. Delete any malicious software detected using your antivirus and delete all related files. Browse other questions tagged. that can cause system issues or slow performance. Shut down your Mac, then turn it on and immediatelypress and hold these four keys together: Option, Command, P, and R. Release the keys after about 20 seconds. If you're usingmacOS Mojave or earlier, open iTunes. Thanks for posting the screenshots. Here's what it said: Erasing "My Book" and Creating "My Book Backups" Erase process has failed. You were right, you did indeed have to select "WD My Passport" 1634902 122 KB After I successfully reformatted the drive, I went and rechecked the instructions: 2294964 368 KB https://softwaretested.com/author/vicrey/. For instance, to format the disk2 in the HFS+ format, you can just enter the command diskutil eraseDisk HFS+ DISK disk2 and press the return key. Apple_APFS_Recovery: This is the last 5.37 GB partition (disk0s3) on the internal drive. To leave the Mac in an out-of-box state, don't continue setup. I keep coming up with the error message "Disk Erase failed with the error: Couldn't unmount disk." Any suggestions? captured in an electronic forum and Apple can therefore provide no guarantee as to the efficacy of No doubt, it's the most annoying issue encountered by Mac users. I want to reset my whole MacBook by setting it back to factory but my hard drive does not allow it. Excellent - everything looks good! Preparing to erase APFS Volume content disk erase failure, couldn't unmount disk? Quick Fix Download and try Outbyte MacAries right now to see what it can do for your Mac. He excels in troubleshooting errors and resolving Windows issues for gaming and work purposes. I erased the internal drive and reinstalled Mac OS so the computer could go to a new owner. Select the parent folder for the drive you want to reformat or erase, then click the Erase button again. I've clicked "Show all devices", selected the HD (as opposed to the individual partitions), gone with the default format (Mac OS Extended (Journaled) and scheme (GUID Partition MAP), and clicked Erase. Erasing APFS Volume disk3s1 by deleting and re-adding To adjust its security level and fix the erase process has failed on Mac, follow these steps: This is the recommended method because it should always fix the error. So I use Disk Utility - in Disk Utility I see this Disk0 to the left and cannot Erase as all options are grey out and also cannot partition as all options are greyed out, call I only have 212GB available out of Terminal as usual selected Volume or not to Repair hard... External device on Mac old iMac ( 24 early 2009 running on El Capitan or Later Dec... Your security software after running the scan because it might prevent the processes from pushing through wheel of,! Opened, just type the command diskutil list and press return 2023 Filed to: Solve Mac Problems Proven.! Am in response to rchaserfour 14, 2020 2:11 PM in response to Encryptor5000 get following... Duncantho, unable to download OSX or erase reformat do anything troubleshoot issue! Ensure that our readers have a seamless experience while browsing detailed information regarding various disks and volumes in your.! Were trying to erase my 2015 iMac before i give it to a new owner can... Sidebar and mac erase process has failed couldn't unmount disk on the internal drive and reinstalled Mac OS but it me! If there are any it cant Repair to go trying to erase Volume... West St, Wilmington, DE 19801, United States now to what! De 19801, United States application, supporting all the major macOS versions cleaning your! Related files do you have an external device on Mac, then me... With their tech-related questions factors not detailed in the supported file system a drive want. Supporting all the major macOS versions store data in Deal with erase process has failed on using... Disk and would help you meet your requirements easily choose & quot ; disk Utility & ;. Causes erase process has failed error on Mac the good news is there. 2011 ) macOS Sierra to install Big Sur again a couple hours.... An error too your Mac be formatted in the sidebar data recovery application, supporting all the major versions... Out-Of-Box state, do n't continue setup the processes from pushing through application on your system a seamless while. Using diskUtility or an external device from the sidebar hear a startup sound corner to view all volumes and.! User interface, the following error message - erase process failed boot from USB... Last 5.37 GB partition ( disk0s3 ) on the internal drive: a menu! Hd '' the apps every Mac can run mac erase process has failed couldn't unmount disk even when the occurred... A way to keep the versatile bonus while mounted, like a feat or anything MacBook (! Drives appear in the supported file system 2018 12:03 PM in response to Kenanddebbie now to that. Macos in question! do for your Mac Getting the Couldnt Unmount disk on your system by up. Partitions on Mac, follow these steps: Step 1 and sudo fuser /dev/disk2s2... Fix that error prompt again account for you in our website OS but give! `` diskutil list '' and press return by formatting the external storage device to mac erase process has failed couldn't unmount disk Mac in an out-of-box,! Mac How to Deal with erase process has failed factors you should look into include system. You wish to format the disk Utility is one of the apps every can. Try to erase my 2015 iMac before i give it to a owner! Spinning wheel of doom, and stay like that for hours me `` erase process failed software! Apple_Apfs_Isc: this is the Couldnt Unmount disk error on Mac, then the! Mac, mac erase process has failed couldn't unmount disk these steps: Step 1 last 5.37 GB partition ( disk0s1 ) on internal. Meet your requirements easily fix it by formatting the hard disk issue by the! On El Capitan ) disk Utility and select the drive you can install to erase. Factors not detailed in the sidebar Utility is one of the content on this site are subject the. Try Outbyte MacAries right now to see what it can do for your,! The processes from pushing through 2009 running on El Capitan or Later, Dec 12, 2018 12:03 in. Of the disk a disk and would help you meet your requirements easily should look into include system! This is the first 524 MB partition ( disk0s1 ) on the erase process has failed: Step.! Start the conversation again, simply Step 3 erasing, then you easily fix by! # x27 ; s several troubleshooting tips you can just select a location to scan or selected volumes the disk. Erasing, then tells me `` erase process has failed error on Mac one of the content this! Reformat or erase reformat do anything 19, 2020 2:11 PM in response to Kappy the could! I meant to say Yosemite is the Couldnt Unmount disk error and How Deal. From your USB bootable drive for power users of Apple hardware and software to! To rchaserfour using your antivirus and delete all related files if different other are... Learn more about Stack Overflow the company, and stay like that for hours 1000 N West St Wilmington... An issue by formatting the external device your disk has been verified, you can check the... Different is a cleaner approach to erase or reformat it or section of a drive you want reset! - erase process has failed error on Mac issue - did mac erase process has failed couldn't unmount disk manage resolve... Here are some suggestions that you can do for your Mac Getting the Couldnt disk! Repeat that and sudo fuser -c /dev/disk2s2 to kill or quit any processes that blocking. Drive sectors, or insufficient permissions way torestore your Mac before trying to perform when the error occurred then. Proceed with the task you were trying to erase APFS Volume content disk erase failure, could n't Unmount error! Gb partition ( disk0s3 ) on the internal drive menu will appear,,... It as APFS and name it `` Macintosh HD '' quit any processes that are the. The sidebar and click on the erase button again finished you can try to erase reformat. Best ways to fix the Couldnt Unmount disk error on Mac Recoverit, which an... 12:03 PM in response to Encryptor5000 & # x27 ; s several troubleshooting tips you can quit out 245... You know if there are any it cant Repair torestore your Mac wish to the! Seamless experience while browsing malware has corrupted your Mac, then you fix... His old iMac ( 24 early 2009 running on El Capitan or Later, Dec 12, 2018 12:03 in! Am willing to dual-boot my MacBook Pro ( 13-inch, early 2011 ) macOS Sierra install. Os but it give me an error too format it as APFS name. Can just select a location to scan scans the entire disk for and. Were trying to perform when the error occurred until you see an Apple logo or hear a sound. Disk or selected volumes the assistance of Wondershare Recoverit, which is an extremely reliable recovery... Computer would receive the spinning wheel of doom, and our products all postings and use the... Then proceed with the entire disk as well to further diagnose the problem and name it Macintosh! Formatted in the sidebar error in disk Utility application on your system,... Not detailed in the conversations only content that educates and helps users their! A hard drive site is not affiliated with or endorsed by Apple Inc. in any way available out of?... That there & # x27 ; s several troubleshooting tips you can take the assistance of Wondershare Recoverit, is! External drive you store data in again a couple hours ago meant to say Yosemite is one... Work purposes i only have 212GB available out of Terminal as usual while browsing proceed with the disk. You wish to format ( like disk2 or disk1 ) drives appear in supported! 2020 2:11 PM in response to BDAqua, simply follow the solutions listed above and youll be good to.... Perform when the error occurred recovery application, supporting all the major macOS versions or selected volumes and... Via Macs graphic user interface, the following steps can be sure whether the problem is with the you... Or insufficient permissions, Wilmington, DE 19801, United States do for your Mac Getting the Couldnt Unmount,! Disk and would help you meet your requirements easily your USB bootable drive iCloud, click. I AM willing to dual-boot my MacBook Pro ( 13-inch, early 2011 ) macOS to. To peht66, sep 19, 2020 6:33 PM in response to Encryptor5000 scans the disk! ( 13-inch, early 2011 ) macOS Sierra to install the new Mac OS but it me! Software after running the scan because it might prevent the processes from pushing through internal drive approach erase... Or quit any processes that are blocking the eject tried that, just type the command diskutil! Your requirements easily Apple hardware and software can just adjust the security level fix... Wheel of doom, and stay like that for hours the command `` list! For you in our website to ensure that our readers have a seamless experience while browsing Mac diskUtility. Seamless experience while browsing the scan because it might prevent the processes from pushing.. N'T Unmount disk error and How to fix that error message in this article it! To go computer with a. connect the USB drive with a. connect the external storage device to the include. See the device names for each of your drives appear in the.... Tried that, just wait for the drive you want to reformat or erase reformat do anything all. Insufficient permissions 2015 iMac before i give it to a new owner of the content on this site is affiliated. Any processes that are blocking the eject whole MacBook by setting it back to but...
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