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User profile for user: GilesWhiteley
GilesWhiteley Author
User level: Level 1
22 points

Missing Macintosh HD on reinstall of OSX - Terminal Help needed.

Background:

I was wiping and restoring an early 2014 MacBook Air to give to a family member. All was going well and I reinstalled OSX using Cmd-R. First reboot failed and hung - it was clear something was wrong. First aid found nothing wrong with the disk so I repeated the erase and went to reinstall OSX again.


This time Macintosh HD was missing entirely. Did some googling and learned about disk repair in terminal. So..


Used 'diskutil list' to find the drive identifier.

Disk is 'disk0s2'

Used 'diskutil verifyVolume / disk0s2'


This is where I have the problem - the response to that is..

'Ownership of the affected disk is required'


Now I am stuck. Can anyone help? I need to repair this disk in the hope that it can be found again and the Mac brought back to life.


Thanks,


Giles

MacBook Air 11", macOS 10.13

Posted on Apr 21, 2020 2:28 AM

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User profile for user: keg55
keg55
User level: Level 6
11,743 points

Posted on Apr 21, 2020 5:48 AM

Try booting into Internet Recovery using Shift+Command+Option+R keys. This should let you install the OS version that the Mac shipped with. If your Macintosh HD was formatted APFS, look at the next paragraph.


If for any reason you installed High Sierra or above, you may need to first boot into Internet Recovery a different way using Command+Option+R. Then open Disk Utility, change the View to Show All Devices, select your DISK (e.g. Apple SSD SM0128F Media) and Erase it. Format it as Mac OS Extended (Journaled) which should create your Macintosh HD volume. Last reboot into Internet Recovery from the first paragraph to install the OS that came shipped with your Mac.

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User profile for user: keg55
keg55
User level: Level 6
11,743 points

Apr 21, 2020 5:48 AM in response to GilesWhiteley

Try booting into Internet Recovery using Shift+Command+Option+R keys. This should let you install the OS version that the Mac shipped with. If your Macintosh HD was formatted APFS, look at the next paragraph.


If for any reason you installed High Sierra or above, you may need to first boot into Internet Recovery a different way using Command+Option+R. Then open Disk Utility, change the View to Show All Devices, select your DISK (e.g. Apple SSD SM0128F Media) and Erase it. Format it as Mac OS Extended (Journaled) which should create your Macintosh HD volume. Last reboot into Internet Recovery from the first paragraph to install the OS that came shipped with your Mac.

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Missing Macintosh HD on reinstall of OSX - Terminal Help needed.

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