Summary: First Aid process has failed on external hard drive? In this article, we will tell you what to do if First Aid can't repair external hard drives, SD cards, USB flash drives and more. If necessary, recover lost data from the external hard drive with iBoysoft Data Recovery for Mac to avoid permanent data loss.
- Mac First Aid Unable To Unmount Volume For Repair Cost
- Mac First Aid Unable To Unmount Volume For Repair Iphone
Mac users like you already know that First Aid on Mac might help fix some disk problems when the disk is not working properly. However, it sometimes can fail to repair the disk. During the running of First Aid on an external hard drive, one of the following error messages may pop up indicating First Aid operation failure:
Apr 25, 2018 Checking volume bitmap. Checking volume information. The volume Macintosh HD appears to be OK. File system check exit code is 0. Restoring the original state found as mounted. Operation successful. Should I be concerned that the volume could not be unmounted. What does that mean and what is the impact on my computer.
- '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.'
Note: Help me please mmd for mac. Only when you are using the external hard drive as a startup disk and run First Aid to repair it, you could see the error message to ask you to run First Aid from macOS Recovery.
- In Disk Utility's sidebar, select the volume, container, or physical drive you wish to use the First Aid tool on. Click the First Aid button in the Disk Utility toolbar, or select Run First Aid from the File menu. A sheet will drop down, asking if you wish to run First Aid on the selected device. Click the Run button to start the First Aid.
- Nov 18, 2017 To those who have installed Mojave on APFS file system with a GUID/GPT Scheme (I suppose it will work even on MBR scheme), I have managed to 'fix' the 'APFS Recovery Volume' to make it bootable from any computer (capable of HighSierra and Mojave) with USB input devices (trackpad, keyboard, USB mouse and so on) responsive, working wifi.
- When the first aid could not unmount the volume for repair, try using the 'Use the terminal application' method to unmount the disk volume. Method 3: Use the terminal application. Terminal application allows you to control your Mac operations via the command prompt. Command-line can be used to eradicate 'Can't unmount disk' from Mac.
Don't worry. This post will help you solve the First Aid not working problem and recover lost data from the troubled external hard drive.
- Table of contents
- 1. What does First Aid do in Disk Utility?
- 2. What to do if Disk Utility's First Aid has failed on external hard drives?
- 3. Conclusion
First of all, let's take quick look at what First Aid can do in Disk Utility.
What does First Aid do in Disk Utility?
First Aid in Apple's Disk Utility is a small utility designed to verify and fix minor problems of a drive, such as repairing the drive's data structures, fixing external hard drives not mounting on Mac, external hard drive not readable on Mac and so on. It has the capability to detect and repair the damages to partition map, master directory block, device driver and so on.
But why Disk Utility's First Aid would fail on external hard drives?
Most of the time, First Aid's failure on external hard drives is due to severe disk corruption which was brought about by improper ejection, physical damage, virus infection or other reasons.
In the next section, you will learn what to do if First Aid repairing process has failed on external hard drives.
What to do if Disk Utility's First Aid has failed on external hard drives?
Generally speaking, if you can't run First Aid on an external hard drive to repair it, the solutions left for you to repair the corrupted external hard drive on Mac are limited. We have concluded three methods for you to try one by one, hoping they can repair the corrupted external hard drive successfully without losing data.
Solution 1: Run First Aid one more time
On Apple's official Support page, users are encouraged to run First Aid more than once. First Aid will try to verify and fix the content on the selected volume every time. Therefore, there might be a hope that it works after you rerun it. If you are receiving a constant result saying the process has failed, you can move to the next solution.
Solution 2: Run FSCK command from Single User Mode
FSCK (File System Consistency Check) is Mac and Linux version of CHKDSK command in Windows. It can check the file system and try to repair the damages it finds. FSCK command can be run to repair a boot disk or a non-boot disk. Therefore, if running First Aid on Macintosh HD failed or Macintosh HD could not be repaired in Disk Utility, you can also run FSCK command to repair the startup disk.
However, unlike CHKDSK command in Windows, you can't run FSCK command inside the operating system. You need to exit the operating system and reboot into Single User Mode.
Tips: You won't be able to see this article when you are running FSCK command, so we recommend you write down the steps below especially the command lines for your convenience.
Follow the steps to fix the corrupted external hard drive using FSCK command:
Step 1: Go to Disk Utility, select the corrupted external hard drive, and remember the file system and Device name. In the picture below, the file system in Mac OS Extended (HFS) and Device name is disk3s2.
Step 2: Restart your computer and hold down Command + S keys to boot into Single User Mode.
Step 3: Release the keys until you see white text appears on the startup screen.
Step 4: Wait until you see root#appears at the bottom of the text.
Step 5: Run the following command:
Tips: Remember to replace 'hfs' with the file system on your external hard disk. For example, type fsck_msdos for FAT file system and type fsck_exfat for exFAT file system. Remember to replace disk3s2 with the Device name of your external hard disk too.
Step 6: Wait until the checking and repairing process is completed and run reboot command.
Hopefully, the command has helped you fix file system errors on your external hard drive. If your external hard drive is still not working properly after you reconnect it to the Mac, proceed to the last solution.
Solution 3: Reformat the external hard drive
If you have encountered the First Aid operation failure when trying to fix external hard drives and neither of the solutions above works, the disk is probably severely corrupted. The simplest and most efficient way is to reformat the corrupted external hard drive to make it workable again. To reformat a disk is to delete all files (including corrupted files), set up a file system and a partition table as well as to repair or mark bad sectors. Those are the main factors that cause disk corruption, so to reformat a disk can solve almost all disk problem you may come across. But before that, you'd better back up as many files as possible to another drive, just as Disk Utility suggested.
However, you probably won't be able to back up your files directly from the seriously corrupted external hard drive. In this situation, data recovery software comes for help.
Mac First Aid Unable To Unmount Volume For Repair Cost
Step 1: Recover as much data as possible with iBoysoft Data Recovery for Mac
iBoysoft Data Recovery for Mac is reliable external hard drive data recovery software for Mac users. It is able to recover deleted or lost data from unreadable/unmountable/formatted/corrupted external hard drives. In addition to external hard drive data recovery, it is also a tool that supports USB flash drive data recovery, SD card data recovery and so on. Moreover, it is a data recovery tool for Mac that supports data recovery for encrypted APFS disks. This software is fully compatible with macOS 10.15/10.14/10.13/10.12 and OS X 10.11/10.10/10.9/10.8/10.7.
Recover lost data from corrupted external hard drives with iBoysoft Data Recovery for Mac
1. Download, install and launch iBoysoft Data Recovery for Mac.
2. Select the external hard drive that First Aid failed to repair and click Next. The program will start scanning this drive for recoverable files.
3. Double-click the found files to preview after the scanning process finishes.
4. Select what you want to get back and click Recover.
5. Go through the recovered files and make sure all desired files are back.
Step 2: Erase/reformat the external hard drive in Disk Utility
1. Go to Finder > Applications > Utilities > Disk Utility.
2. Select the external hard drive and click Erase on the top toolbar.
3. Provide the required details including a name, a format, and a scheme.
4. Click on Erase button.
5. Wait until the process finishes.
If the external hard drive still doesn't work on Mac after reformatting, it's very possible that the external hard drive has been damaged physically. You have to send it to a local service center or replace it with a new one.
Disk Utility's First Aid repairing process doesn't fail on external hard drives only. It could happen to any external disks including pen drives, SD cards, memory sticks, etc. As a result, if you come cross First Aid operation failure on any external disks, this post can still be very helpful.
Aug 28, 2020 • Filed to: Solve Mac Problems • Proven solutions
Mac First Aid Unable To Unmount Volume For Repair Iphone
Couldn't Unmount Disk/Volume for Repair Error on Mac? 4 Ways to Fix
Mac and its features are excellent unless a data lost and deleted files mess up. This error can occur due to various reasons like disk crashing, unmounting error, partitioning, and others. This article will guide you step by step through various causes and specific ways by which the disk issue can be resolved which will help you to repair the issue of unmounting disk/volume on Mac.
Part 1- What does 'couldn't unmount disk' mean?
To know about the solutions, first, let's understand about unmounting and disk utility, and the causes of the disk error.
- Unmounting a disk means disconnecting a disk drive or optical disk from the computer.
- Usually, the error 'Couldn't Unmount Disk' shows up when you try to format, partition, verify or repair internal disk by Disk Utility on Mac system.
What causes the 'Couldn't Unmount Volume' error?
The causes of this error are several, starting with the abrupt shutdown and inconsistent file system. The other reasons for 'Couldn't Unmount Volume' error are:
- Human error: Deleting or formatting the files or data improperly in between the ongoing operations can cause disk error.
- Interrupting Read/Write operations: In the hurry of working or accessing the data, sudden interruption in the system process can result in data loss or data corruption.
- Forced or unintentional formatting of data: Unknowingly deleting some system files or data files can result in data loss or faulty disk error.
- Virus attack: Malicious attacks can harm the data. It can be due to the software or accessing an unauthorized website.
These are a few of the reasons that prompt the 'Couldn't Unmount Disk' error. Other causes can be system related like Error in Bootstrap, Improper Kernel Installation, Hardware or Software crash, and many more.
Part 2 - 4 methods to fix 'Couldn't Unmount Disk' on mac
There are several ways to fix the disk error. Let's drill down to the four possible solutions that can be used to fix the 'Couldn't Unmount Disk' error on Mac:
- Method 1: Right Steps to Unmount Volume for Repair on Disk Utility
- Method 2: Fix with a USB boot drive
- Method 3: Use the terminal application
- Method 4: Repair with a recovering partition
Method 1: Right Steps to Unmount Volume for Repair on Disk Utility
The simplest solution to unmount volume for repair is to unmount the disk on disk utility.
To unmount the volume, start by accessing the disk utility.
To access the disk utility, follow the step below:
Step 1: Click on the Spotlight icon from the menu bar.
Step 2: Type Disk Utility in the search field.
Step 3: Double-click on the Disk Utility icon.
Step 4: In the Disk-Utility app, select the disk that you want to unmount in the sidebar.
Step 5: Click the unmount button in the toolbar or beside the disk set name.
After following these steps, you can erase the Mac hard drive volume. In case the error still occurs, try repairing the drive using the USB boot drive method.
Method 2: Fix with a USB boot drive
If you're struggling with the 'Couldn't Unmount Disk' error, the way to fix this is to boot the Mac system from another drive and then run Disk Utility on the disk.
Ensure that the USB boot drive is attached to the device. Next, follow the steps below:
Step 1: Insert the USB boot drive to Mac and reboot the system.
Step 2: While rebooting, hold down the Option key button to select the attached boot drive.
Step 3: Next, in the boot menu, select 'Disk Utility' to access it.
Step 4: After selecting the Disk Utility option, go to 'First Aid' and verify the disk.
Once you click on ‘First Aid' it will show you the second screen as below and ask for the option. You need to click on the ‘Run' option to move forward in the process.
After you ‘Run' the First Aid option as shown in the above screen, it will show you the progress and show ‘Operation Successful' on the completion. You have to click on the 'Done' button once the operation is successful as shown in the below image.
Step 5: The repair is done.
You can start performing the tasks which were halted due to the error. When the first aid could not unmount the volume for repair, try using the 'Use the terminal application' method to unmount the disk volume.
Method 3: Use the terminal application
Terminal application allows you to control your Mac operations via the command prompt. Command-line can be used to eradicate 'Can't unmount disk' from Mac.
To access the terminal application (command prompt), here are the steps to be followed:
Step 1: Open the 'Terminal Application' from the 'Utilities' menu.
Step 2: Then, type 'diskutil list' on the command prompt to get the list of all the disks on Mac.
Step 3: Now, search for the disk you want to force unmount. For example, the syntax of the disk may be '/dev/diskx'
Step 4: After finding the disk, type 'sudo diskutil unmountDisk force/dev/diskx' line and replace '/dev/diskx,' i.e. disk number with '/dev/disk1' which is an acceptable disk number.
Method 4: Repair with a recovering partition
Recovering the Partition method is used to recover the disk error while formatting a non-booted partitioning or by First Aid. However, this method will not be feasible if the disk and the primary boot partition is at the same location.
To use the recovering partition method, follow the steps below:
Step 1: Reboot your Mac device by holding the 'Option' key.
Step 2: Then, choose the 'Recovery Partition' option from the Boot menu.
Step 3: From the Boot Menu, select 'Disk Utility' and go to 'First Aid' to verify and repair the disk or go to 'Erase' if you wish to format the disk. With repair partitioning, you can unmount the disk for repair.
Part 3. Recover lost files on Mac after all methods fail
In case all these methods fail to repair the disk, you can use Recoverit to retrieve the data. Recoverit Mac Data Recovery is a one-stop solution to recover all the deleted, or lost files on Windows and Mac.
Step 1. Select the Device:
For the selection of a specific device, you will need to select the specific drive under the tab 'Devices'' or Desktop under the 'Select Location' tab.
Once you have selected the specific drive, simply click on the 'Start' button to proceed.
Step 2. Scan the location:
Once the previous step is completed, Recoverit will automatically start an all-around scan that will help to find all the lost, deleted, or formatted data on the disk.
Once you have found the data that you were looking for, you can either pause or even stop the scanning process.
Step 3. Preview and recover files:
Recoverit allows previewing the recovered files via thumbnails, preview button, double-clicking a single file, or by toggling between the two preview angles. To recover selected data, you can preview it first and then retrieve it.
How to fix macOS First Aid volume could not be unmounted? ›
If you're struggling with the 'Couldn't Unmount Disk' error, the way to fix this is to boot the Mac system from another drive and then run Disk Utility on the disk. Ensure that the USB boot drive is attached to the device.How do I force my Mac to unmount disk? ›
- In the Disk Utility app on your Mac, select the disk set that you want to unmount in the sidebar.
- Click the Unmount button in the toolbar or beside the disk set name.
- Disconnect the disk member that you want to unmount.
What does 'couldn't unmount disk' mean? If you see an error message telling you that macOS couldn't unmount a disk, it usually means that a process on your Mac is trying to modify your boot disk and can't because macOS won't allow the disk that it has booted from to be unmounted.Why can't I unmount my external hard drive Mac? ›
The system can?t unmount the disk you are currently booted from. So you need to start from a different volume to modify the internal drive. This can be achieved by booting your Mac from an external hard drive or macOS Recovery. After that, you can open Disk Utility from macOS Utilities to unmount the drive.
- In the Disk Utility app on your Mac, choose View > Show All Devices. ...
- In the sidebar, select a volume, then click the First Aid button .
- In the First Aid dialog, click Run, then follow the onscreen instructions.
- When the First Aid process is complete, click Done.
- Try again – and make sure you are using the right key combination. ...
- Check your keyboard. ...
- Try a different way to access Recovery mode (M-series Macs) ...
- Try alternative Recovery options (Intel Macs) ...
- Check if your Recovery partition is there/working.
For that using the terminal application again, enter the following command: sudo diskutil unmount force /dev/(enter here disk identifier name) Then press return and enter the admin password if prompted. This will definetely unmount the entire disk and all its related volume.How do you fix a hard drive that won't mount Mac? ›
- Method 1: Change macOS Drive Display Settings.
- Method 2: Reconnect Your Drive.
- Method 3: Restart Your Mac.
- Method 4: Force Mount Your Drive With Disk Utility.
- Method 5: Use Disk Utility's First Aid Tool.
- Method 6: Reformat Your Drive.
On your Mac, choose Apple menu > Log Out, then log in again. Try to eject the disc again. If you still can't eject the CD or DVD, choose Apple menu > Restart. While your computer restarts, press and hold the mouse or trackpad button until the disc is ejected.How do I get rid of disk full error? ›
- Way 1: Check Virus or Malicious Software on your Disk.
- Way 2: Clean your Recycle Bin.
- Way 3: Unhide Files and Folders.
- Way 4: Clean Temporary Files.
- Way 5: Delete Junk Files and Large Files.
- Way 6: Delete Unnecessary Windows Update.
- Way 7: Turn on System Protection.
- Way 8: Remove Drive Letter by Hidding the Recovery Partition.
How do I fix not enough disk space error? ›
- In the search box on the taskbar, type disk cleanup, then select it from the results.
- Select the drive you want to clean up files for, then select OK.
Resolution. To avoid these error messages, copy the file to your hard disk drive or to another disk that has sufficient free space before opening it in Excel. If you need to store the file on a floppy disk, first save the file to the hard disk and then copy it onto the floppy disk using Windows Explorer.How can I unmount my internal storage as a disk drive? ›
Safely Unmount SD Card in Android
Within Settings, tap the Storage button. Scroll down the Storage screen, and near the bottom, you'll find what we're looking for. Tap the Unmount SD Card button. And then tap OK to confirm in the pop-up that appears.
Step 1: Boot your Mac into macOS Recovery mode. Step 2: Go to Disk Utility and erase the unmountable Mac internal hard drive. Step 3: Go back to macOS Utilities screen and select Reinstall macOS. Then, follow the onscreen wizard to reinstall the OS.How do I reset my external hard drive Mac? ›
- Open Disk Utility. The program icon looks like this:
- Select the external drive you want to format on the left hand side of the window.
- Click the Erase button.
- Select FAT32 or exFAT format from the drop down menu.
- Click Erase and follow the prompts.
Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet.How do I recover data from a corrupted Mac hard drive? ›
- Launch Disk Utility. Launch Disk Utility from the Utilities folder under your Application folder. ...
- Choose your hard drive. Go to Choose View > Show All Devices. ...
- Repair volumes, containers, and disks.
To repair the corrupted document, follow these steps: Step 1: Open the corrupted file then hover to File on the upper left corner of the screen. Step 2: Click on Save As on the option then click Format. Step 3: Select Rich Text Format from the list.How do I reset my Mac when Command +R isn't working? ›
You'll need to use a different method to boot into Recovery mode. – With your Mac powered off, press and hold the power button. – When you see “Loading startup options”, let go of the power button. – Eventually, you will be able to select Options > Continue and this will open up Recovery mode.Can you reset a Mac without recovery mode? ›
Restart your Mac while holding down the 'Option+Command+R' keys. Release these keys as soon as you see the Apple logo.
How do I restore my Mac to factory settings from recovery mode? ›
Restart your Mac. Choose Apple menu > Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions.How do I force eject an external hard drive? ›
- Open File Explorer. You can do this by holding the Windows key + E, or double clicking This PC.
- Navigate to then click My PC on the left side of the window.
- Find your external USB hard drive, right-click it, then select Eject.
To avoid losing data, it's important to remove external hardware like hard drives and USB drives safely. Look for the Safely Remove Hardware icon on the taskbar. If you don't see it, select Show hidden icons . Press and hold (or right-click) the icon and select the hardware you want to remove.What causes a Mac hard drive to fail? ›
Electrical damage – Power surges or the discharge of static electricity can cause a drive failure. Moisture or humidity – Exposing an HDD or SSD to extremely high humidity or moisture can destroy the drive. Excessive heat – Heat can cause your drive to fail.What is the command to eject a disk from a Mac keyboard? ›
Press the Eject key to eject the CD or DVD from the drive. On any keyboard, including those originally designed for use with a Windows PC, press and hold the F12 key until the CD or DVD is ejected from the drive. This may take several seconds. Locate the desktop icon for the CD or DVD.Can disk errors be repaired? ›
Yes, repairing the disk errors works because it helps store the data properly and the drive will work normally after repair.Can disk error be fixed? ›
To fix disk errors, you can use the Chkdsk tool found in Windows operating systems. Chkdsk (Chkdsk.exe) is a command-line tool that creates and displays a status report for the disk by checking volumes for problems.Why does my Mac keep saying my disk is full? ›
The warning message indicating that your startup disk is almost full appears when there is no longer enough free space on your disk. This is often due to having too many files occupying your Mac's hard drive, bringing free space to a dangerously low level. To resolve this issue, you need to free up some disk space.Why does it say I don t have enough storage even though I do? ›
If you have many apps on your Android device and use them simultaneously, cache memory on your phone can be blocked, which leads to Android insufficient storage. In this case, you can choose to uninstall some unwanted or unused apps to free up storage space.What happens if you remove SD card without unmounting? ›
Removing the card without unmounting it can result in data loss. Please note that if any of your apps have used the SD card to store data, these apps may not work correctly when the card has been unmounted.
What happens if you uninstall an internal hard drive? ›
Effect on How the Computer Operates
Computers can turn on and display the system BIOS screens without a hard drive, so removing the drive doesn't damage anything -- it just renders the computer useless.
Mounting a drive does NOT alter the hard drive, although once a filesystem has been mounted it can be modified (unless it was mounted read-only) by typical filesystem operations like creating a directory/folder, creating files, modifying files, etc ....How do I reinstall macOS when startup volume is deleted? ›
- Turn on your Mac and immediately press and hold Command (⌘)-R.
- Choose Reinstall macOS from the Utilities window.
- Click Continue and follow the onscreen instructions.
If you can't move or copy a file or folder, you might need to change its permissions settings. You might also need to change permissions settings for the disk, server, or folder where you want to move the item. On your Mac, select the item, then choose File > Get Info, or press Command-I.How do I unlock my internal hard drive on my imac? ›
To unlock the disk, you must enter the backup password you created when you turned on encryption for the disk. Store the backup password in your keychain so the drive is unlocked automatically when it's connected to the same computer in the future.How do you completely wipe and Reset an external hard drive? ›
Connect your external drive to your PC via a USB port. Then, press the Windows key + X and select Disk Management. Right-click the drive you'd like to wipe and select Format. Choose a new file system.Is there a way to Reset an external hard drive? ›
Click the Windows icon, type Disk Management, then click Create and format hard drive partitions. Right-click the disk that says Not Initialized or Offline, then select Initialize Disk or Online. Some external USB hard drives don't have the option to be initialized.How do I Reset my Seagate external hard drive to factory settings Mac? ›
- Make sure the storage device is connected to and mounted on the computer.
- Select Go > Utilities in the Finder menu bar.
- In the Utilities folder, double-click Disk Utility. ...
- Select the Seagate drive in the left column.
- Click the Erase tab.
- Choose a format from the drop-down window.
- Enter a name for the volume.
If you insert your card and it doesn't mount, remove the card and insert it again. Sometimes the SD card won't mount properly if you insert the card too slowly or too quickly. If the card still won't mount, you might need to reformat your SD card.What does it mean to unmount a volume on Mac? ›
(1) To disconnect a disk drive or optical disc from a computer. When a user selects "eject" to evacuate an optical disc from the computer, the operating system unmounts the medium.
What does volume unmounted mean? ›
Unmounting a volume makes its filesystem inaccessible to its Droplet's operating system. This means the OS can't write to or read from the volume. You should unmount volumes before resizing or detaching them to protect data integrity.How do I mount an unmounted external hard drive Mac? ›
- First, make sure that your external or internal hard drive is correctly connected to your Mac computer.
- Next, reboot the Mac computer and open Disk Utility > locate and select the unmounted drive > Select Mount at the top menu.
The best way to do that is: Step 1: Go to the settings on your Android phone. Step 2: Choose Settings, then Format/Reset SD Card > Mount SD Card. Step 3: Following this step will solve any software issue and will make it accessible to users.How do you reset an SD card on a Mac? ›
- Connect your SD card to your Mac using a SD memory card reader.
- Open Disk Utility app.
- Select your SD card.
- Choose Erase function.
- Enter SD card name (optional)
- Choose filesystem format. If 64GB or larger, choose exFAT. If 32GB or smaller, choose FAT32.
What happens when a volume is unmounted? When a volume is unmounted, its drive letter is unassigned and may be used by another storage device. While unmounted, the volume's file system is inaccessible by regular reads and writes.What happens if I delete Macintosh HD volume? ›
When you delete a volume, all the data on the volume is permanently erased, and the volume is removed from the container. In the Disk Utility app on your Mac, select the APFS volume you want to delete in the sidebar.How do I unmount volume? ›
In your Windows VM open "Administrative Tools" ->"Computer Management" -> "Disk Management". Choose a volume you want to unmount. Right-click and select "Change Drive Letter and Paths". Select the volume's drive letter and click "Remove".How do I unmount my internal Storage as a disk drive? ›
Within Settings, tap the Storage button. Scroll down the Storage screen, and near the bottom, you'll find what we're looking for. Tap the Unmount SD Card button. And then tap OK to confirm in the pop-up that appears.How do I delete unmounted partition on Mac? ›
- In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button in the toolbar. ...
- In the Apple File System Space Sharing dialog, click Partition.
- In the pie chart, click the partition you want to delete, then click the Delete button . ...
- Click Apply.
If you eject a volume, you can use Disk Utility to mount the volume so that it's available in the Finder. In the Disk Utility app on your Mac, select the volume you want to mount. Click the Mount button .
How to recover files from an external hard drive that won t mount? ›
- Download and install EaseUS Data Recovery Wizard on your computer.
- Connect the unmounted hard drive to the computer via USB hard drive adapter or USB cable.
Mounting a drive does NOT alter the hard drive, although once a filesystem has been mounted it can be modified (unless it was mounted read-only) by typical filesystem operations like creating a directory/folder, creating files, modifying files, etc ....