How to Fix Macintosh HD not Mounted in macOS Mojave?

Posted by Molly to Mac Data Recovery on July 10th, 2018

Since the availability of the latest Mac operating system, many users have encountered the Macintosh HD not mounted in macOS Mojave issue. Just like Macintosh HD not mounted in High Sierra, if the Mac hard drive won't mount in macOS Mojave, your Mac will be unable to boot up and the data stored on the drive will be inaccessible.

Don't worry. This article will show you how to recover data from the unmountable Mac hard drive and also how to fix the Macintosh HD not mounted in Mojave issue. Read on.

How to recover data from the unmountable Macintosh HD in macOS Mojave?

When the Macintosh HD didn't mount in Mojave, your any attempts to troubleshoot the Mac hard drive might write new data on it and make the original data irrecoverable. Thus, without backups, you should firstly recover data from the unmounted Mac hard drive with iBoysoft Mac Data Recovery, and then go through the solutions to fix the problem without worrying about data loss.

iBoysoft Mac Data Recovery is able to help you create a bootable recovery drive and recover data from unmountable APFS boot volumes, recover data from corrupted APFS boot drives, recover data from the startup drive on macOS High Sierra, Mojave and earlier Mac operating systems.

Solution 1: If you have only one Mac computer

If you have only one Mac computer, please directly run iBoysoft Mac Data Recovery bootable media from iBoysoft Server and recover lost data from the unmountable Macintosh HD.

Solution 2: If you have two Mac computers

Step 1: Download iBoysoft Mac Data Recovery on another Mac computer.

Step 2: Install and launch iBoysoft Mac Data Recovery.

Step 3: Click iBoysoft Data Recovery on menu bar and then select "Create Boot Drive".

iBoysoft Data Recovery create bootable drive

Step 4: Insert a USB drive into your Mac computer.

iBoysoft Data Recovery create bootable drive

Step 5: Follow the wizard to create a bootable recovery drive.

iBoysoft Data Recovery create bootable drive

iBoysoft Data Recovery create bootable drive

Step 6: After that, please insert iBoysoft Mac Data Recovery bootable USB drive into the unbootable Mac computer, and then press the Power button and Option key (⌥) to start the Mac up.

iBoysoft Data Recovery create bootable drive

Step 7: Select iBoysoft Mac Data Recovery from the boot options.

Step 8: Follow the wizard to scan for lost data on the unmountable Macintosh HD.

Step 9: Choose the files you want to get back, and then click Recover button.

What's more, iBoysoft Mac Data Recovery is able to recover data from failed internal Mac hard drives, unmountable/unreadable/inaccessible external hard drives, USB drives, SD cards, CF cards, memory cards and other devices.

How to fix Macintosh HD not mounted in macOS Mojave?

After recovering data from the unmountable macintosh HD, let's try out the solutions to fix the Macintosh HD or Mac internal hard drive not mounted in Mojave issue.

Solution 1: Fix Macintosh HD not mounted in macOS Mojave with Disk Utility.

Step 1: Restart the computer and hold down the Command and R keys immediately when the Mac turn on. Release the keys until you see the Apple logo. This will boot the Mac into Recovery Mode.

Step 2: Select Disk Utility from the macOS Utilities menu.

Step 3: Select the unmountable Macintosh HD from the sidebar.

Step 4: Click First Aid on the top.

Step 5: Restart the Mac when the reparation process finished.

Solution 2: Fix Macintosh HD not mounted in macOS Mojave with Terminal

Step 1: Go to Applications > Terminal.

Step 2: Enter: diskutil list. This will list out the available volumes.

Step 3: Check the volume identifier from the table that appears.

Step 4: Enter: diskutil repairVolume/disk volume identifier. Please replace disk volume identifier with that of your Macintosh HD.

Solution 3: Reset NVRAM

NVRAM is a small amount of memory that your Mac uses to store certain settings and access them quickly. Thereby, you can attempt to reset the NVRAM. Reboot your Mac and simultaneously press "Command+Option+P+R" keys. After resetting, you can retry to mount the Macintosh HD in macOS Mojave.

Solution 4: Fix Macintosh HD not mounted in macOS Mojave by reformatting.

If you have tried out all the solutions above but failed to fix Macintosh HD partition not mounted in macOS Mojave, the last chance may be erasing the Mac hard drive and reinstalling macOS. Once again, please make sure you have made a backup, or have recovered data from the unmounted Mac hard drive.

Step 1: Boot the Mac into Recovery Mode and select Disk Utility.

Step 2: Select the unmounted Macintosh HD from the sidebar.

Step 3: Click Erase on the top of the Disk Utility window.

Step 4: Provide the required information and start to reformat it.

Step 5: Go back to macOS Utilities menu and select Reinstall macOS.

Step 6: Follow the onscreen instructions to reinstall a new macOS.

Step 7: Restart your Mac and check if the Macintosh HD can now be mounted in macOS Mojave or any other Mac operating system you installed.

Still have questions?