After upgraded to Big Sur, I've decided to restore Catalina. I used a time machine backup. I got some problem at the beginning, but now it's ok, the only problem which remain is that there are two new Volumes named "Machintosh SSD - Dati" and "Update".
"Machintosh SSD" is the main drive.
What are they and how to remove them?
In Disk Utilities and refer to below image.
That " Update " Volume can be removed by using the Minis ( - ) sign. That volume is showing as a mount point of /Volumes/ Update and a left over from Big Sur installation.
The " Macintosh SSD" and " Macintosh SSD Dati " must be kept.
Why, starring in Catalina, Apple has make two Volumes on the drive. The First is where the Operations System is and is Read Only, the Macintosh SSD - Dati is where your Personal Files and Applications are kept.
In Disk Utilities and refer to below image.
That " Update " Volume can be removed by using the Minis ( - ) sign. That volume is showing as a mount point of /Volumes/ Update and a left over from Big Sur installation.
The " Macintosh SSD" and " Macintosh SSD Dati " must be kept.
Why, starring in Catalina, Apple has make two Volumes on the drive. The First is where the Operations System is and is Read Only, the Macintosh SSD - Dati is where your Personal Files and Applications are kept.
You are welcome and thank you too.
Do come back to the Apple Support Communities ( ASC ) in the future, if / or when additional questions may arise
Restore Time machine backup creates two new Volumes
