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3 instances of "Macintosh HD"

Hi,


After upgrading to Catalina, i'm blessed with 3 versions of my SSD drive:


Clearly, it's the same disk (I have only 1 disk) and they are all 1TB of size. I've read that this has something to do the way the new APFS is working, but I'm sure that I can get rid of the "Data" disks somehow (or hide them).


But how?


Thanks,


Helpless dude.

Posted on Jan 30, 2020 8:29 AM

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Question marked as Top-ranking reply

Posted on Jan 30, 2020 9:10 AM


About the read-only system volume in macOS Catalina - Apple Support https://support.apple.com/en-us/HT210650



You need to erase/reformat the parent drive—

From Internet Recovery/ or boot from a TM backup/ or boot from a USBinstaller to get to DiskUtility.


DiskUtility>View>Show All Devices> here you can select the parent drive, erase/reformat This will delete/erase ALL data.



then quit DiskUtility and reinstall the macOS. Restore your user from a backup.


How to reinstall macOS from macOS Recovery: https://support.apple.com/en-us/HT204904




Boot clone https://discussions.apple.com/docs/DOC-10081

How to use Time Machine to back up or restore your Mac: https://support.apple.com/en-us/HT201250


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2 replies
Question marked as Top-ranking reply

Jan 30, 2020 9:10 AM in response to BjoernDirchsen


About the read-only system volume in macOS Catalina - Apple Support https://support.apple.com/en-us/HT210650



You need to erase/reformat the parent drive—

From Internet Recovery/ or boot from a TM backup/ or boot from a USBinstaller to get to DiskUtility.


DiskUtility>View>Show All Devices> here you can select the parent drive, erase/reformat This will delete/erase ALL data.



then quit DiskUtility and reinstall the macOS. Restore your user from a backup.


How to reinstall macOS from macOS Recovery: https://support.apple.com/en-us/HT204904




Boot clone https://discussions.apple.com/docs/DOC-10081

How to use Time Machine to back up or restore your Mac: https://support.apple.com/en-us/HT201250


Jan 30, 2020 8:54 AM in response to BjoernDirchsen

Your Mac HD now has two volumes, created by Catalina, one is the now read only mac HD (for security reasons) and the other is the read/write Mac HD - Data which contains your User folder and other files.


Apparently, you reinstalled Catalina at which point the OS created a second Data volume. Unless you follow these steps and erase your disk, it will create another Data volume (again).


https://support.apple.com/en-us/HT208496

3 instances of "Macintosh HD"

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