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The Macintosh HD is not mounted on your Mac, which means the startup disk is not available on macOS, so your Mac won't boot. In this case, if you don't carry out a data rescue as soon as possible, you may suffer severe data loss.
In this post, we would like to introduce 5 solutions to fix the Macintosh HD not mounting on a Mac issue, but before taking solutions, try to save your files to avoid losing data!
Recover Macintosh HD Data Using Software💎
EaseUS Data Recovery Wizard for Mac is a professional data recovery software that can recover data from a MacBook that won't turn on quickly and safely.
The Macintosh HD not mounting on a Mac, also known as the disk0s2 not mounted error, may caused by numerous reasons, including a corrupted file system, incompatible file format, damaged hard drive, etc. EaseUS software can fix most of all complex data loss scenarios.
Even if your Macintosh HD is not mounting due to "com.apple.DiskManagement.disenter error 0", a common mounting error on macOS, EaseUS software can recover data with clicks. Check out the following steps!
Step 1. Install and run EaseUS Data Recovery Wizard for Mac on another Mac computer, and select "Unbootable Mac > Start".
![Launch EaseUS Data Reocvery Wizard for Mac and select unbootable Mac](/images/en/screenshot/data-recovery-mac/products/start-unbootable-mac-recovery.png)
Step 2. Then, choose a prepared USB drive to create the bootable disc. Select "Next" to start creating the bootable disk.
- Warning
- The creator will prompt to erase the drive to reallocate the space; then it can write the bootable files to this drive. Please back up all USB files before processing "Eraser".
Step 3. The program starts to create a 2GB space and save the boot files. The rest space on the USB can be still used for storage.
Step 4. Once it completes, please follow the guide to boot the corrupted Mac from the bootable disc and start the recovery. We suggest you restore the data to an external hard drive.
Step 5. After booting the Mac, launch EaseUS Data Recovery Wizard for Mac. Select the disk location (an internal HDD/SSD or a removable storage device) where you lost data and files. Then, this recovery tool will scan for lost files automatically.
Note: Before data recovery, you'd better create a backup of your Mac to avoid further data loss. After backing up, the software can recover data from the Mac backup, and your computer can wirte new data again.
![select a location and scan for lost Mac data](/images/en/screenshot/data-recovery-mac/products/recover-data-step2.png)
Share this article on social media to help others learn how to recover data from the Macintosh HD that is not mounted and how to fix this problem with 5 effective solutions.
After saving your data from the unmounting Macintosh HD, refer to the 5 solutions below to fix the Macintosh HD not mounted and Macintosh HD not showing up in Finder issues:
Solution 1. Run First Aid to Repair Macintosh HD
First Aid in a built-in disk repair tool on macOS. Here are the steps to run First Aid on Macintosh HD:
Step 1. Go to "Finder > Applications > Utilities > Disk Utility".
Step 2. Choose the Macintosh HD in the left panel, and click the "Mount" button at the top menu.
Step 3. Click on the "First Aid" option, and click "Run" to confirm.
If the First Aid process has failed, don't panic, and try the next method.
Solution 2. Use Terminal to Fix Macintosh HD Not Mounted
Here are steps to fix the Macintosh HD not mounting error with Terminal:
Step 1. Boot Mac in Recovery Mode.
Step 2. Choose "Utilities > Terminal" from the list.
Step 3. Enter the command and check the Volume Identifier. The mentioned command will list available volumes.
diskutil list |
Step 4. Enter the command.
diskutil repairvolume /disk ** |
Note that "**" needs to be replaced with Macintosh HD's volume identifier on your Mac.
Solution 3. Reboot Your Mac in Safe Mode
Booting your Mac into Safe Mode will scan and repair disk errors; check out the following steps:
Step 1. Shut down your Mac.
Step 2. Hold the "Shift" key when booting your Mac.
Step 3. Release the "Shift" key when the login window appears.
Solution 4. Run FSCK Command in Single User Mode
The FSCK command can fix Macintosh HD or other internal hard drives not mounting on a Mac issue. Follow the steps below:
Step 1. Restart your Mac when holding "Command + S" to boot into Single User Mode.
Step 2. Type in: /sbin/fsck -fy.
Step 3. Repeat the command until you see "The volume [name] appears to be OK".
Solution 5. Erase Macintosh HD and Reinstall macOS
If the above methods don't work, consider erasing your Macintosh HD and reinstalling macOS. However, erasing your Macintosh will delete all stored data on it, so you should save data with EaseUS software before erasing it.
After saving your data on a safe storage location rather than the Macintosh HD, here are steps to refer to:
Step 1. Boot your Mac into Recovery Mode, and choose "Disk Utility" in the macOS Utilities window.
Step 2. Select the Macintosh HD, and click the "Erase" button at the top menu.
Step 3. Set the name and new format of the formatted Macintosh HD, and wait for the erasing process to complete.
Step 4. Go back to the macOS Utilities window and choose "Reinstall macOS".
Conclusion
This post introduces how to fix the Macintosh not mounting error with 5 tested solutions, including running First Aid to repair the Macintosh HD, using Terminal, rebooting your Mac into Safe Mode, running FSCK command in Single User Mode, and erasing the Macintosh HD.
To avoid data loss during the fixing process, you should use EaseUS Data Recovery Wizard for Mac to recover the stored data on the Macintosh HD as soon as possible.
Macintosh HD Not Mounted FAQs
Here are questions people also ask when they search for how to fix Macintosh HD not mounting issue:
1. Why is Macintosh HD not mounted/showing in Disk Utility?
Many reasons may cause a hard drive, such as Macintosh HD, not mounted in Disk Utility, including a damaged file system, the operating system carshes, an incompatible file system with macOS, etc.
2. How do I mount my Macintosh HD in recovery mode?
Boot your Mac into recovery mode by holding "Command + R" and release the keys once you see the Apple logo. Then, go to "macOS Utilities > Disk Utility" and select "Mount" to mount the Macintosh HD.
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Brithny is a technology enthusiast, aiming to make readers' tech lives easy and enjoyable. She loves exploring new technologies and writing technical how-to tips. In her spare time, she loves sharing things about her game experience on Facebook or Twitter.
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EaseUS Data Recovery Wizard is a powerful system recovery software, designed to enable you to recover files you’ve deleted accidentally, potentially lost to malware or an entire hard drive partition.
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EaseUS Data Recovery Wizard is the best we have seen. It's far from perfect, partly because today's advanced disk technology makes data-recovery more difficult than it was with the simpler technology of the past.
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EaseUS Data Recovery Wizard Pro has a reputation as one of the best data recovery software programs on the market. It comes with a selection of advanced features, including partition recovery, formatted drive restoration, and corrupted file repair.
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