2 not mounted volumes take 100 gb

Dear Sir/Madam


I have a problem where 2 unmounted volumes take 100 gb of space in my MAC hard drive.And also for some reason I have two Macintosh HD data and one is unmounted.

My question:

Can I get rid of the "2 not mounted" to get my 100 gb back?

please help as I need the 100gb really badly

yours sincerely


Posted on Dec 27, 2020 8:31 AM

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Posted on Dec 28, 2020 10:23 AM

Deleting an unused volume should not have an adverse effect on you Mac.


You should be able to view the contents of this volume by selecting it from the Desktop or the left pane of a Finder window if you have the Finder configured to show mounted volumes.


Use Disk Utility to delete the unused APFS volume after making sure you have a backup of the data stored on it.

https://support.apple.com/guide/disk-utility/add-erase-or-delete-apfs-volumes-dskua9e6a110/mac

12 replies
Question marked as Top-ranking reply

Dec 28, 2020 10:23 AM in response to ragegolder

Deleting an unused volume should not have an adverse effect on you Mac.


You should be able to view the contents of this volume by selecting it from the Desktop or the left pane of a Finder window if you have the Finder configured to show mounted volumes.


Use Disk Utility to delete the unused APFS volume after making sure you have a backup of the data stored on it.

https://support.apple.com/guide/disk-utility/add-erase-or-delete-apfs-volumes-dskua9e6a110/mac

Dec 28, 2020 1:15 AM in response to HWTech

I also found this in terminal,


   |   APFS Volume Disk (Role):   disk1s2 (Data)


    |   Name:                      Macintosh HD - Data (Case-insensitive)


    |   Mount Point:               Not Mounted


    |   Capacity Consumed:         107644137472 B (107.6 GB)


    |   FileVault:                 Yes (Locked)


    |

Dec 27, 2020 11:43 AM in response to ragegolder

You can only remove one of the "Macintosh HD - Data" volumes. Just make sure you have all the data located on the unmounted " - Data" volume before removing that volume since it is impossible to recover accidentally deleted data from an SSD.


Starting with macOS 10.15 Catalina and continuing with macOS 11.1 Big Sur macOS now uses multiple APFS volumes so all the other APFS volumes must stay:

https://support.apple.com/en-us/HT210650

Dec 28, 2020 1:30 PM in response to ragegolder

Normally an identically named volume will be automatically renamed by macOS with an " 1" appended to it, but due to how and where macOS creates the mount points this may not happen for the "Macintosh HD - Data" volume. Just use "Get Info" on the volume you just mounted to confirm its size and then give it a different name so you don't confuse the two volumes.

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2 not mounted volumes take 100 gb

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