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Unable to Mount external hard drive on mac solved The Mac Helper. Can't Copy Files From MacBook to. How to force a Hard Drive to unmount for formatting in Mac OS X Disk Utility. That means if your Mac or MacBook Pro can’t mount its startup disk, it is likely that you will experience problems, like your computer gets stuck on the login screen or it does not boot at all. Situations like this can be very annoying, especially if you have critical and important files stored on the “unmountable” hard drive. Sometimes when the drive is formatted with NTFS, it can't be mounted on Mac. By default, macOS only enables NTFS drive read support but disables write support. In this case, you can mount external hard drive with the help of free NTFS driver for macOS.

My mac recently gave up and I'm trying to salvage whatever data I can from the hard drive. I was able to boot using the OSX Installation CD and fire up Disk Utility that basically told me that the drive could not be repaired and I need to format it. My question - how can I manually mount it (from Terminal) and try to recover some of my data? I figured that if Disk Utility can see it, perhaps I could too. Thanks.

• Access Disk Utility from the appeared Boot menu (however, if you use Installer disk, go to Utilities menu and click Disk Utility option). Go to First aid. Verify the disk and repair it if it’s necessary.
• Ran Disk Utility and I get 'Incorrect number of thread records', and it tries3 times and issues an ERROR: Disk Utility can't repair this disk. Backup as many of your files as possible. Nows the question - how. How do I backup files from a drive that is not mounted.
• I had a mac-system Volume not showing up in Disk-Util any more. (so my mac didn´t start any more) Somehow i managed to install OSX on a new Hard-Drive and plugged the old one external. Linux was still able to mount my Volume. But couldn´t read my Pictures and Documents Folder, because of readonly Disk and no rights to read these Folders.
• You can mount and unmount drives, volumes, and disks from the command line of MacOS and Mac OS X. For many users, the easiest way to unmount a drive in Mac is to either just drag a volume into the Trash, use the eject keys, disconnect the drive, or use one of the force eject methods.

sa125sa125

2 Answers

To mount disks:

diskutil list

see your drive and note id#, then:

diskutil mountDisk /dev/diskn

where n is the # you id'ed in diskutil list

You can try something like this:

And replace disk1s10 with the identifier of your drive.

JW8JW8

Not the answer you're looking for? Browse other questions tagged macosmountdata-recoveryhard-drive-recovery or ask your own question.

I've searched and tried a lot of stuff but still can't get it to work.

I was able to use my seagate HDD properly last week but now it doesn't mount. I tried plugging it to a PC & another mac, it works fine on both. The reasons could be

1. Updating OS to macOS Sierra
2. Not ejecting properly
3. Installed sims4 with wineskin

Things I have tried.

1. From disk utility clicking on mount & first aid.
2. From terminal writing: diskutil mount disk2s1 & diskutil mount readOnly disk2s1 both resulted with this Volume on disk2s1 failed to mountIf the volume is damaged, try the 'readOnly' option
3. From terminal writing: diskutil repairDisk disk2s1 & diskutil repairVolume disk2s1.
4. Restarted mac in normal mode & safe mode.
5. /private/var/log/install.log from here found some logs but don't know what to do with them.
6. Switch USB ports & retry.
7. A couple of other things.

9 Answers

I'd recommend checking if fsck is holding your disk hostage upon connection. This was it for me.

Running ps aux grep fsck revealed:

root 2587 7.3 0.1 4363584 21780 ?? U 10:56PM 2:22.54 /System/Library/Filesystems/exfat.fs/Contents/Resources/./fsck_exfat -y /dev/rdisk2s1

So the solution was a sudo kill -9 2587 (insert your PID instead of 2587) (or sudo pkill -f fsck).As soon as that ran, my Volume immediately mounted.

Oh the irony of fsck being the problem..

Addendum (surfacing from comments):Ideally, you're better off letting fsck run its course. Otherwise, you'll run into this the next time too.

I had a similar issue. The external drive did not show in finder. I tried booting into Single User mode and ran all the fsck commands with no success.

The drive was detected but when it is plugged in fsck starts to execute and it seems to run indefinitely. In my case it looped around the Could not repair after 3 attempts' error but then it just restarted the tests again.

I was not able to kill the fsck process either, it just kept going.

Finally I downloaded the free version of DiskDrill and clicked on the Rebuild button. When doing that, Diskdrill showed me drive content. However I could not select mount in the Free version and could not pay 89$ for recovering a non-important drive worth 30$.

However, I found it interesting that DiskDrill could see content and offered me to mount the drive so I wondered if it had done something good. So I went back to Disk Utility that previously did not allow me to Mount the broken drive and tried to Mount again and now it worked. I think DiskDrill unblocked something.

After mounting, I was able to format the drive successfully.

I tried all other options I could find, using command line, disk utility etc and this was the only thing that unblocked the situation. So it seems tools like Disk Drill etc can accomplish more than what Mac OS offers and it might be worth looking into if you have this issue. In my case I managed to work around it with the free version in combination with DiskUtility but if you need to recover files you probably need the full version (I could see the drive content but since I did not care about it, I just formatted the drive).

I've tried just about everything on every forum I read short of formatting my hard drive. I was able to save my data by plugging my hard drive into an older Macbook not using High Sierra. After the beachball went away after a while I was able to see and drag my folders to another external hard drive one by one. It took a few days because it was a 3T, but I was able to copy everything. Hope this helps!

I had a mac-system Volume not showing up in Disk-Util any more. (so my mac didn´t start any more)Somehow i managed to install OSX on a new Hard-Drive and plugged the old one external.

Linux was still able to mount my Volume. But couldn´t read my Pictures and Documents Folder, because of readonly Disk and no rights to read these Folders. So couldn´t change the rights to readable by anyone.So i couldn´t copy my Data to an other Disk ! (i didn´t want to pay DiskWarrior)

Then my only Solution was:

How To Mount Disk

(first i created the Folder: /my/hfs with mkdir, and instead disk1s2 you should use your disk and volume numbers)

Nimesh Neema

Although macOS Sierra should allow you to read NTFS drives natively, have you tried installing MacFuse? This always works for me.

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You can get the latest version from GitHub. (Just download the .dmg and install)

This free utility will allow you to mount, read and write to NTFS disks.

Allan

Cannot Mount Disk Mac

Your drive is not mounting because the file system is corrupted and it is not seeing it as a valid file system.

Most likely, your drive has or is in the process of failing. My suggestion is to use a tool like DiskDrill's free tools to see if there is anything recoverable. If it is and it makes sense to, then you can purchase a license to recover your data.

AllanAllan

Disk file system corrupted, indeed. If the disk is dying or not good anymore is easy to see with a tool. Download DriveDx from binaryfruit.com (trial) and the recommended satsmart driver. Test the disk.

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I have solved this issue by moving everything in the hard drive to another computer. Formatting the hard drive and moving everything back.

If you're having the same problem Ariel's solution sounds reasonable. Let me know if that works out so I can accept it as the solution.

I had the same problem and I used this solution that I found here:https://support.wdc.com/knowledgebase/answer.aspx?ID=20789#highsierra

Just a word of caution - this solution involves erasing the drive, so please read the entire article before you take any action with your hard drive!

Cannot Mount External Disk Mac

Hope it helps!

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