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/Catalina?
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.
This short video shows you tutorial to recover data from unmounted Macintosh HD on macOS Mojave:
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 in recovery mode and recover lost data from the unmountable Macintosh HD.
Step 1: Click the Power button to turn on the Mac, and immediately press COMMAND+OPTION+R keys until you see the spinning globe. This will boot your Mac into Recovery Mode.
Step 2: Go to Utilities > Terminal from the menu bar to open Terminal.
Note: If your Mac hasn't connect to internet, you need to choose a WiFi network in the upper-right corner of the screen.
Step 3: Run the following command:
s='/private/var/tmp/boot.sh' && curl -o $s http://boot.iboysoft.com/boot.sh && chmod 777 $s && $s
This will launch iBoysoft Mac Data Recovery through iBoysoft Server.
Step 4: When launching iBoysoft Mac Data Recovery, you should select the Macintosh HD and click the "Next" button. This program will start scanning for lost files on the drive.
Step 5: Preview the scanning results, and choose the files you want to get back.
Step 6: Click the "Recover" button. You need to specify a different location to store the recovered files.
Solution 1: If you have only two Mac computers
If you fortunately have another healthy Mac computer, or you can borrow one from your friends, you can create a bootable drive and then recover data from it.
Step 1: Create a bootable drive on the healthy Mac computer.
1. Download, install and launch iBoysoft Mac Data Recovery.
2. Click iBoysoft Data Recovery on menu bar and then select "Create Boot Drive".
3. Insert a USB drive into the healthy Mac, and choose it as the media to create a bootable drive on.
4. Click "Make bootable" button. The creation process will start immediately.
Note: This process will erase all data on the USB drive. So please be sure to make a backup if there're important files.
5. Wait a moment while it is creating the bootable drive.
6. When the process completed, you'll see a window showing the next steps to recover data. You can take a note, or take a photo with your phone, of the onscreen information. When everything is ready, click the "Close" button.
Step 2: Recover data from the unbootable Mac computer.
- Insert iBoysoft Mac Data Recovery bootable USB drive into the unbootable Mac computer.
- Reboot your Mac computer and hold down the Option key (⌥) at startup.
- Select iBoysoft Mac Data Recovery from the boot options. This program will launch when your Mac boots up.
- Follow the wizard to scan for lost data on the unmounted Macintosh HD partition.
- Choose the files you want to get back, and then click the "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 the unmounted macOS partition, usually Macintosh HD 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.
If the Macintosh HD won't mount in macOS, probably your Mac will not turn on properly. In this case, you may have no access to the files stored on the Mac hard drive. Here you can learn many proven methods to recover data from the unmounted Macintosh HD and also fix the unbootable Mac. If you still have questions, please feel free to contact us.