Summary : This blog explains five best ways to resolve the 'external hard drive not mounting' issue on Mac.
It also shares a reliable software-based method to recover data from unmounting (or un-mountable) USB hard drive on Mac. Free evaluate the best Mac external drive recovery software from the below.
While it will be a hassle, there is a way to get it on your computer. Put the CD in a CD player, hook the outputs of the CD player to your microphone input (you need a RCA female x2 to 1/8' mini-plug adapter), use any recording software you have (I like Sound Studio, but there are many others), hit record and record the whole album.
I erased all data on Macintosh HD but now when I go to reinstall OS X there is no hard drive appearing when prompted to select a hard drive to install OS X. I go back to disk utility and Macintosh HD is gone, it has been replaced with disk0s2 which is not mounted. Here is a picture of my disk utility. Disk Utility, however, reported that the disk was unrepairable. Now, I tried connecting it using USB 2.0 (rather than FireWire 800), and connecting it to another Mac, but still, no dice. I was beginning to resign myself to buying Disk Warrior to laboriously reconstruct the directory structures, but I wasn’t quite done troubleshooting yet. Alternatively, you can also select the disk and click on Mount to make it accessible by the operating system using Disk Utility. However, hard drive problems may happen that your WD external hard drive won't mount on Mac, usually when you desperately need to access some data stored on it.
When you connect an external hard drive on Mac, it will show up on Desktop, Finder, and DiskUtility. But sometimes the external drive won’t appear on any of these places. Consequently, data inside the unmounted external hard drive turns inaccessible. The contained files and the external drive’s integrity comes to a stake.
Don’tworry, read and apply the below fixes to resolve Mac unmounted external drive issue.
1. Change macOS Settings
Ensure Finder preference to show external disks on Desktop or Finder is enabled.
Ensure Disk Utility’s View menu has “ShowAllDevices” option selected.
2. Reset Mac Firmware Settings
Reset NVRAM (Non-volatile RAM) & PRAM (Parameter RAM).
Reset SMC (System Management Controller) on your Mac.
3. Fix External Hard Drive Connectivity Issue
Ensure proper connectivity of your external hard drive to your Mac.
ReadCaseStudy: Whooping 94% data recovered from unmounted external drive on MacBook Pro
4. Troubleshoot External Hard Drive
Mount the external hard drive from Disk Utility.
Repair hard drive from Disk Utility.
Check the SMART status of the external hard drive if it unmounts intermittently.
5. Recover Data from Non-Mounting External Mac Hard Drive
Ensure the external hard drive is detected in Disk Utility, then fulfill the following data recovery prerequisite.
Leverage the Mac external drive recovery software to recover data from the not-mounting external storage drive.
Note: *Trial software allows you to scan storage drive and preview scanned files. Activate Stellar Data Recovery Professional for Mac by using its activation key and recover the files.
Watch the next video to know more about the software and its usage.
Conclusion
This blog presented 5 different methods to troubleshoot ‘external hard drive not mounting’ issue on Mac. You can begin with fixing the external hard drive connectivity issue, changing macOS settings, resetting Mac firmware settings, troubleshooting the drive, and finally recovering data from the hard drive.
If the external hard drive is not detected in Disk Utility, then it may have a hardware issue. And if the basic hard drive connectivity fixes don’t resolve the problem, then you need to try Stellar Data Recovery software for Mac.
We hope this blog post helped you understand the possible reasons, as to why macOS can’t mount the external drive on Mac and how to troubleshoot and recover the unmounted Mac external drive. For any query, write to us in the comments section below.
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Summary: Unable to mount Macintosh HD in Disk Utility in macOS Big Sur/Catalina/Mojave/High Sierra? Cannot access the data stored on the Mac hard drive? Don't worry. This article will show you 7 efficient solutions to fix Macintosh HD not mounted/showing up in Disk Utility issue without losing data.
Mounting a hard drive on Mac means to make the drive available for the operating system, which requires a mount point to read and write this hard drive. If the internal hard drive of Mac, the disk0s2, or the Macintosh HD is not mounted on Mac, you'll see one of these:
In fact, Macintosh HD - Data (in macOS Catalina and macOS Big Sur) or Macintosh HD not mounted problem is quite common on Apple computers.
If you have met the same situation above, what can you do to fix the problem without worrying about data loss? Now, read on to learn the solutions. Contexts 2 4 download free.
Hard Drive Won't Mount MacWhy does Macintosh HD not mounted/showing in Disk Utility?
The volume Macintosh HD, which is greyed out in Disk Utility, is found corrupt and needs to be repaired before mounting for those 5 primary reasons.
Unmountable Macintosh HD Data Recovery
Note: Before fixing the Macintosh HD not showing up in Disk Utility issue, please stop using the Mac computer and make sure you have a backup copy of the Mac hard drive.
Mac Disk Won't Mount
That's because, your any further operation on the Mac computer, including troubleshooting the hard drive not mounting errors, may write new data to the unmounted Mac hard drive and overwrite the original data.
Without backups, you need to recover lost data from crashed/dead Mac hard disk or use Target Disk Mode
Method 1: Recover lost data from unmountable Macintosh HD with iBoysoft Data Recovery for Mac
iBoysoft Data Recovery for Mac is free Mac hard drive data recovery software which helps you recover lost data from the unmountable Macintosh HD.
It also helps retrieve files from corrupted Mac hard drive when there is a boot issue, and recover data from T2-secured Mac , like MacBook Pro, MacBook Air, iMac introduced in and after 2018.
It is fully compatible with macOS Big Sur 11/Catalina 10.15/Mojave 10.14/High Sierra 10.13/10.12 and OS X 10.11/10.10/10.9/10.8/10.7. It supports Mac photo recovery as well as documents, videos, audio files and emails recovery.
Within three steps - select, scan and recover, you can get all lost data back.
Moreover, it also provide with powerful preview features and different filtering functions. After scanning, it allows you to preview all recoverable files no matter what file types you have lost, including documents, photos, videos, music files, emails, etc.
The filtering and sorting functions enable you to quickly target the right content from a mass of scanning results.
Tutorial to recover data from the unbootable Macintosh HD
Though it's unbootable, you can still rescue your data by running iBoysoft Data Recovery for Mac in macOS Recovery Mode. This method is highly recommended because it is a lot easier and time-saving.
Note: Before you follow the steps below, you have to make sure your Mac has Internet connection.
Method 2: Use Target Disk Mode
Target disk mode is a boot mode which allows you to browse and transfer files to and from a Mac internal hard drive without booting macOS. It can be used for troubleshooting the internal hard drive not showing up on Mac.
• How to transfer files to and from a Mac with Target Disk Mode?
How to fix Macintosh HD not mounted in Disk Utility?
After recovering data from the Mac hard drive that is not mounted in Disk Utility, you can follow the solutions to fix the issue.
Solution 1: Restart your Mac computer
No matter what happens to your Mac computer and makes your Macintosh HD unmounted, the first and foremost solution is to shut down your Mac computer and restart it up again. Simply holding down the on/off key until the computer turns off, waiting a few minutes, and then turning it back on. Sometimes when you turn it back on, everything returns to normal.
Solution 2: Repair the unmountable Macintosh HD in Recovery Mode
If the Macintosh HD is unable to be mounted in Disk Utility normally, you can try to repair it with Disk Utility's First Aid in Recovery Mode.
Solution 3: Fix Macintosh HD not mounted by Terminal
If Disk Utility stopped repairing Macintosh HD in macOS, you can then try to fix it with Terminal.
Solution 4: Run FSCK command in Single User Mode
FSCK is a command-line tool to check the consistency of a hard drive and repair disk errors. If the solutions above are unable to fix Macintosh HD or the Mac internal hard drive not mounted issue, you can have a try.
Solution 5: Try Safe Mode
When trying to boot into Safe Mode, macOS will scan and repair any errors it finds on the disk. To boot into Safe Mode, you need to shut the Mac down and start it up while holding down Shift. Release the Shift key when you see the login window. Should your computer boot properly, try restarting and booting as normal.
Solution 6: Reset NVRAM on your MacCan't Mount Disk Mac
NVRAM is a small amount of memory used to store certain settings for quick access on Mac. The corrupted NVRAM can cause Mac glitches or even prevent macOS from starting.
So, if your Mac computer won't boot properly, you can attempt to reset the NVRAM. Reboot your Mac and hold down the 'Command + Option + P + R' key buttons. After resetting, you can retry to mount the Macintosh HD on Mac.
Solution 7: Erase the unmountable Macintosh HD and reinstall macOS
If the Macintosh HD won't mount, and your Mac still cannot recognize the Mac internal hard drive, the final chance is to factory reset the Mac - format the Macintosh HD and reinstall macOS on it. But as you know, reformatting will erase all the data stored on the Macintosh HD. Please make sure you have recovered data with iBoysoft Data Recovery for Mac as above.
What to keep in mind: Once you encountered the Macintosh HD not mounted error, the first thing you should do is to save your data on the Mac hard drive. Without regular backups, a data recovery program like iBoysoft Data Recovery for Mac will help you recover lost data from the unmounted Mac hard drive. Then, try to fix the Macintosh HD not mounted issue.
Final thoughts
It's so frustrating that Macintosh HD greyed out in Disk Utility in Recovery Mode, especially when you have important data stored on the Mac. But the good news is that quite a few feasible solutions are available to fix this issue.
Before that, if you care about data on the Macintosh HD, you should recover lost data from the unmountable Macintosh HD with iBoysoft Data Recovery for Mac. Download and install this free Mac data recovery software, you won't be bothered by any data loss scenarios.
Read Content Hub for: hard drives not showing up/mounting issues
External Drive Won't Mount Mac
Which solution helps you the most? Do you have any other solutions to fix Macintosh HD not mounted issue or have any question? Please don't hesitate to email us.
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