Macintosh HD(disk0s2) won't mount

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Level 1

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Macintosh HD(disk0s2) won't mount

I did a mistake in terminal with diskutil and i unmounted my disk0 which is the OS partition and when i rebooted the system,the os didn't come up.i tried cmd+r and gone to the internet recovery and there i tried to mount the disk0s2(which my OS and my data is there) from terminal(with "diskutil mount" and "diskutil mountdisk") but i couldnt mount it.i tried"fsck -fy".I searched a lot but i got nothing. is there anyway to mount the disk0s2 ? if there isn't , is there anyway to rescue my data from the disk0s2 and then reinstall OS ?

MacBook Pro (Retina, 13-inch,Early 2015), macOS Sierra (10.12.3)

Posted on Feb 21, 2017 11:14 AM

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Answer 1

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cavemees

Level 4

1,646 points

Feb 22, 2017 3:15 AM in response to sanhood

If you've only 1 partition and don't have the EFI (boot disk0s1) partition, you've probably removed it with your commands in terminal.

When booted in macOS Recovery, run Disk Utility > First Aid on the disk to see what it can do or not.

If that doesn't help, if available, boot from an external disk and try to mount your internal disk to backup your data.

If you don't have a bootable external disk, you can install macOS Sierra on an external disk, then boot from that disk and hope you can mount your internal disk from there to backup your data.

See the procedure for it on: How to set up and use an external Mac startup disk - Apple Support

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Answer 2

cavemees

Level 4

1,646 points

Feb 21, 2017 2:11 PM in response to sanhood

Try using Disk Utility to repair disk from macOS Recovery, see paragraph "Use the utilities in macOS Recovery" on About macOS Recovery - Apple Support

If that doesn't help, you can re-install macOS without removing your data, see paragraph "If you're reinstalling for other reasons" on How to reinstall macOS - Apple Support

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Answer 3

sanhood Author

Level 1

8 points

Feb 21, 2017 3:15 PM in response to cavemees

i tried to reinstall OS but it cant recognize Macintosh HD volume to reinstalling OS in it. the only volume i have there is EFI.what should i have to do ?

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Answer 4

cavemees

Level 4

1,646 points

Feb 22, 2017 1:20 AM in response to sanhood

If you open Disk Utility from macOS Recovery, which and how many partitions do you see on the disk?

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Answer 5

sanhood Author

Level 1

8 points

Feb 22, 2017 2:54 AM in response to cavemees

one partition that its name is disk0s2 which is my OS partition(and also my data partition)

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