Apr 09, 2018 I’m trying to install on a Mac mini 2014 that I have installed a SSD in. It begins to install shut down and restart. At the point it should be converting to the new file format it restarts and says unable to unmount disk for repair and fails the install. (Or words to that effect) The disk is fine and checks out fine in first aid. Disk utility error fix. There are 2 ways to fix the erase problem with your usb, sd, external hard drive and whatever you are trying to format. First Aid pr. When the list of all disks appears you need to found the disk that you want to force unmount. Type sudo diskutil unmountDisk force /dev/diskx line. Replace /dev/diskx with correct disk number. Follow with steps further to forcibly unmount the disk from your Mac. Oct 18, 2019 'First Aid process has failed. If possible back up the data on this volume. Click Done to continue.' 'First Aid could not unmount the volume for repair. Click Done to continue.' 'First Aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery. Click Done to continue.'
- Mac First Aid Unable To Unmount Volume For Repair Service
- Mac First Aid Unable To Unmount Volume For Repair Cost
- Mac First Aid Unable To Unmount Volume For Repair Iphone
- Mac First Aid Unable To Unmount Volume For Repair 69673
- Mac First Aid Unable To Unmount Volume For Repair Shop
Summary: What to do when Disk Utility or macOS can't repair this disk? You can check out the solutions in this post, or you can easily recover lost data from this corrupted drive with iBoysoft Data Recovery for Mac.
When a disk is not working properly on a Mac, most users would go to Disk Utility and run First Aid to repair this disk. However, the error message 'Disk Utility can't repair this disk' error usually appears when First Aid fails to repair this disk. Though frustrating, but it doesn't mean you will necessarily lose all files. In this article, we will give you effective solutions to fix 'Disk Utility can't repair this disk' issue, especially when you are facing the issue that Disk Utility can't repair external hard drive, or when Disk Utility can't repair Macintosh HD on Mac.
Help! Disk Utility can't repair this disk
You might be experiencing the same or similar situation as the user below.
I am in the midst of trouble where Disk Utility is failing to repair the drive. It gives me message 'Error: Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files'. Now, what should I do to fix this error without losing data on my drive?
Animation rendering software. 'Disk Utility can't repair this disk' is one of the messages you will receive when First Aid failed. Sometimes, it would be followed up with these error messages:
- First Aid process has failed. If possible back up data on this volume. Click done to continue.
- macOS can't repair this disk. You can open or copy files on this disk, but you can't save changes to files on this disk. Back up the disk and reformat it as soon as you can.
- Disk Utility stopped repairing your disk. Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your back-up files.
What can you do in these situations to fix this issue without data loss? Keep reading.
Run First Aid to repair this disk again
One of the most tried and tested solution is to repair this disk one more time. To do First Aid again, follow these steps.
1. Go to Launchpad, find Other, and then launch Disk Utility.
2. Choose View and choose Show All Devices at the upper left of this app.
3. Select the disk or volume you want to repair in the left sidebar, and then click First Aid at the top.
4. Click Run to check and repair for disk errors.
If Disk Utility can't repair your disk still, or you receive a report that the First Aid process has stopped or failed, and it's asking for backing up and reformatting, you'd better firstly follow its suggestion to back up files on that disk to avoid further data loss.
How to back up or recover lost data when Disk can't repair this disk?
Method 1: Back up with Time Machine
There is a built-in tool on your Mac called Time Machine which can help you back up your files efficiently in this case. Here is how:
1. Connect an external storage device with enough free space to your Mac.
2. A notification will pop up and ask if you want to use this device to back up with Time Machine. Click on Use as Backup Disk and follow its on-screen instructions. Go to learn more details about Time Machine backup.
![Unable Unable](https://ugetfix.com/wp-content/uploads/articles/askit/how-to-fix-couldnt-unmount-disk-error-on-mac_en.jpg)
Method 2: Recover lost data from the disk that Disk Utility can't repair
If you don't have an extra external drive in hand or you can't back up files from that disk with Time Machine for some reasons, alternatively, you can recover files with reliable data recovery software, likeiBoysoft Data Recovery for Mac.
iBoysoft Data Recovery for Mac is professional data recovery software for Mac, which can recover lost data from internal hard drives, Macintosh HD, external hard drives, SD cards, USB flash drives, memory cards, memory sticks, etc. Also, when disk is formatted, unreadable, unmountable, unreadable, or unrecognizable, it can easily recover the lost files in these cases. What's more, this program can recover lost data from recover lost data from unmountable macOS partitions, encrypted APFS boot volume, etc.
Through only 4 steps, you can recover lost data from the disk that Disk Utility can't repair.
Mac First Aid Unable To Unmount Volume For Repair Service
1. Download and install iBoysoft Data Recovery for Mac.
2. Launch iBoysoft Data Recovery for Mac.
3. Select the disk and click Next button to scan all lost data.
4. Preview the searching results, choose files you need, and click Recover to get them back.
How to fix 'Disk Utility can't repair this disk' issue on Mac?
Method 1: Fix Disk Utility can't repair this disk error in Single User Mode.
If Disk Utility can't repair this disk, you can try to repair it by running FSCK command on Mac. FSCK is a powerful command line to verify and repair external hard drive in Terminal.
1. Restart your Mac and, before the Apple logo appears, hold down Command + S keys. This will boot your Mac into Single User Mode.
2. Type in:
Cnc 3018 grbl settings. 3. If you see 'File system was modified', then re-type in the command above again until you see 'The volume _ appears to be OK'.
4. To restart your Mac, type in:
Method 2: Fix Disk Utility can't repair this disk error by reformatting.
If you failed to fix the disk using Single User Mode, then, you have to reformat it just as Disk Utility suggested.
Warning: Reformatting will wipe all your files off this disk, so please make sure you have backed up your files with an external drive or have retrieved your files from this corrupted drive with iBoysoft Data Recovery for Mac.
1. Go to Applications > Utilities > Disk Utility.
2. Select the external hard drive and click Erase on the top.
3. Provide a name and a format to format the drive.
4. Wait until the process finishes.
After reformatting this disk, you can restore your backed-up or recovered files to the disk again. IfDisk Utility First Aid still failed on external hard drives, and you receive the information like 'This drive has a hardware problem that cannot be repaired' on your iMac, MacBook Pro, or MacBook Air, you may need to send it to a local repair center or simply replace it with a new disk drive.
Bonus tip: You may not need to repair the disk in Disk Utility
Mac First Aid Unable To Unmount Volume For Repair Cost
In some cases, if an external drive is shared between a Mac and a Windows PC, you could receive the error message 'Disk Utility can't repair this disk' as well. It's because when a USB drive is disconnected by yank out of the USB port, the disk may be busy in getting data settled down. As a result, the disk won't readable by Mac.
For instance, you have a disk that is formatted with FAT32, and you didn't unmount your disk properly when you remove it from your Windows PC. Then the whole volume will be marked as 'busy' and you'll be prompted to repair the volume if you look at it in Mac's Disk Utility. However Disk Utility will fail to repair the volume, and report:
An easy workaround to this 'Disk Utility can't repair the disk' issue in this situation is to simply plug this disk drive back into a Windows PC, and unmount it properly before plugging it into your Mac.
Note: If you are trying to repair your startup disk or startup volume with Disk Utility, you need to restart your computer and hold Command + R to boot into macOS Recovery mode. Then select Disk Utility in the macOS Utilities window and click Continue. If you want to check the Macintosh HD volume in macOS Catalina, please make sure you also check the Macintosh HD - Data volume.
• Mac won't turn on, what to do?
You can’t reformat a drive in macOS Disk Utility when the Erase button is grayed out. This might happen for a variety of reasons, all of which keep you from erasing or reformatting the drives connected to your Mac.
If your MacBook’s Disk Utility won’t let you erase drives, follow the steps below to fix it.
Contents Delphi 2014.2 keygen download.
Mac First Aid Unable To Unmount Volume For Repair Iphone
- 2 What if the Erase Button in Disk Utility is grayed Out?
- 3 Learn how to reinstall macOS after erasing your Drive
Related:
How to erase or reformat a Drive using Disk Utility
Let’s start with a brief explanation of the correct way to reformat or erase drives using your Mac. Feel free to skip this section if you already know how to do it.
You may want to erase your drive as a quick way to create space for new files. Or you might need to reformat it so it works with different operating systems, like Windows, Linux, or even iPadOS.
When you reformat a drive, it also erases all the data on it. So make sure to back up any important files before erasing or reformatting your drives. Pyre 1 50427 – a party based rpg download.
When you’re ready, here’s how to erase or reformat drives:
- Open Disk Utility from the Utilities folder in your Applications.
- In the sidebar, select the drive you want to erase or reformat.
- Click the Erase button at the top of the window.
- Choose a new name and format for your drive, then click Erase.
- Wait for Disk Utility to erase or reformat your drive, then click Done.
What if the Erase Button in Disk Utility is grayed Out?
You’re probably reading this article because the Erase button was grayed out when you tried to erase or reformat a drive using Disk Utility. Use the steps below to fix it and let us know in the comments which one worked for you.
Step 1. Show All Devices and Erase the Parent Drive
By default, Disk Utility only shows the Volumes on your connected drives, rather than the drives themselves. A Volume is the partition or section of a drive you store data in.
Open Disk Utility and select View > Show All Devices from the menu bar. You should see the device names for each of your drives appear in the sidebar.
Select the parent folder for the drive you want to reformat or erase, then click the Erase button again. Take note that when you erase a device, it erases all the Volumes contained within it as well.
Step 2. Run First Aid to Repair Your Drive Before Erasing It
Disk Utility has a First Aid feature that fixes all kinds of issues related to your drives: slow performance, corrupt files, or unexpected behavior. When you run First Aid, it scans the entire disk for errors and lets you know if there are any it can’t repair.
Open Disk Utility and select the drive you want to erase from the sidebar. At the top of the window, click the First Aid button, then agree to Run First Aid.
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.
Combine this step with the previous one to run First Aid on the parent device for your drive, as well as the individual Volumes.
Step 3. Boot Into Recovery Mode to Erase Your Startup Disk
If you’re trying to reformat or erase the startup disk on your Mac, you need to boot into Recovery Mode first. The startup disk is the main hard drive on your computer: the one that stores macOS and all your data. It’s not usually possible to erase the startup disk because your Mac is using it to run macOS.
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.
You should back up your Mac before trying to erase or reformat it.
When you’re ready to boot into Recovery Mode, restart your Mac and hold Cmd + R while it boots up. Keep holding both keys until you see an Apple logo or hear a startup sound.
Mac First Aid Unable To Unmount Volume For Repair 69673
You should see a macOS Utilities window appear. Select Disk Utility from this window and try erasing or reformatting your drive again.
Learn how to reinstall macOS after erasing your Drive
After erasing or reformatting the startup disk—if that was your goal—you need to reinstall macOS before you can use your Mac again. This is because the original macOS installation was on the startup disk you just erased.
Boot into Recovery Mode once more to reinstall macOS or follow our guide to factory reset any Mac. When you reinstall macOS, your Mac behaves as though it’s a brand new machine, with no data on it waiting for you to set it up.
Dan is a freelance writer based in South West England.
He spent two years supervising repairs as a Genius Admin for Apple Retail and uses that knowledge to keep our troubleshooting guides up to date.
Mac First Aid Unable To Unmount Volume For Repair Shop
Long before that, Dan turned to Apple products from a musical background. Having owned iPods for years, he bought a MacBook to learn sound recording and production. It was using those skills that he gained a first-class Bachelor of Science in Sound Technology.