Étonnant. C'est vraiment readonly alors. Mais le disque n'est pas mort puisque tu peux démarrer sur la partition de secours. Reste à récupérer ce que tu peux et à reformater le volume HD pour installer un système neuf.je ne peux rien saisir après root#
C'est bloqué... je peux seulement agir à partir du terminal de la version de secours....
diskutil list internal
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         250.7 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +250.7 GB   disk1
                                Physical Store disk0s2
   1:                APFS Volume Macintosh HD - Donné... 17.2 GB    disk1s1
   2:                APFS Volume Preboot                 1.9 GB     disk1s2
   3:                APFS Volume Recovery                1.7 GB     disk1s3
   4:                APFS Volume Macintosh HD - Données  9.1 GB     disk1s4
   5:              APFS Snapshot com.apple.os.update-... 9.1 GB     disk1s4s1
   6:                APFS Volume Macintosh HD - Données  745.5 KB   disk1s5
   7:                APFS Volume Macintosh HD            11.4 GB    disk1s6
   8:                APFS Volume VM                      1.1 MB     disk1s8APFS Container (1 found)
|
+-- Container disk1 473AD281-0FBB-46A7-AF60-1D3CF261C17A
    ====================================================
    APFS Container Reference:     disk1
    Size (Capacity Ceiling):      250685575168 B (250.7 GB)
    Capacity In Use By Volumes:   41454252032 B (41.5 GB) (16.5% used)
    Capacity Not Allocated:       209231323136 B (209.2 GB) (83.5% free)
    |
    +-< Physical Store disk0s2 BFC482DA-948E-4798-BD79-BD6EF755CAF1
    |   -----------------------------------------------------------
    |   APFS Physical Store Disk:   disk0s2
    |   Size:                       250685575168 B (250.7 GB)
    |
    +-> Volume disk1s1 2602951E-885E-422A-AF58-A5E06429ADA9
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s1 (Data)
    |   Name:                      Macintosh HD - Données - Données (Case-insensitive)
    |   Mount Point:               /System/Volumes/Data
    |   Capacity Consumed:         17234190336 B (17.2 GB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s2 475BF935-6F41-4B77-9DA2-58ABA1029E56
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s2 (Preboot)
    |   Name:                      Preboot (Case-insensitive)
    |   Mount Point:               /System/Volumes/Preboot
    |   Capacity Consumed:         1940856832 B (1.9 GB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s3 BA08A797-DF51-4579-BFB6-D434A90394E4
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s3 (Recovery)
    |   Name:                      Recovery (Case-insensitive)
    |   Mount Point:               Not Mounted
    |   Capacity Consumed:         1676660736 B (1.7 GB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s4 E1D2F8B3-1530-4DEF-A2A9-141EB079FF40
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s4 (System)
    |   Name:                      Macintosh HD - Données (Case-insensitive)
    |   Mount Point:               Not Mounted
    |   Capacity Consumed:         9073442816 B (9.1 GB)
    |   Sealed:                    Yes
    |   FileVault:                 No
    |   |
    |   Snapshot:                  66132C6B-6865-4FE7-8703-F40E43FF76EA
    |   Snapshot Disk:             disk1s4s1
    |   Snapshot Mount Point:      /
    |   Snapshot Sealed:           Yes
    |
    +-> Volume disk1s5 5E3F7619-BC6A-4698-8295-5A9267D72F8C
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s5 (No specific role)
    |   Name:                      Macintosh HD - Données (Case-insensitive)
    |   Mount Point:               /Volumes/Macintosh HD - Données 1
    |   Capacity Consumed:         745472 B (745.5 KB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s6 69D2A9A8-2C20-4F82-8894-8CCF46F1F558
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s6 (System)
    |   Name:                      Macintosh HD (Case-insensitive)
    |   Mount Point:               /Volumes/Macintosh HD
    |   Capacity Consumed:         11387858944 B (11.4 GB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s8 E6040925-004F-4C95-BE9B-855AC44AF8B3
        ---------------------------------------------------
        APFS Volume Disk (Role):   disk1s8 (VM)
        Name:                      VM (Case-insensitive)
        Mount Point:               /System/Volumes/VM
        Capacity Consumed:         1069056 B (1.1 MB)
        Sealed:                    No
        FileVault:                 NoIl ne met pas autorisé de le renommer, en faisant clic droit sur le disque la case "renommer" est grisé.Le disk1s4.
diskutil list internal
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         250.7 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +250.7 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD - Donné... 17.3 GB    disk1s1
   2:                APFS Volume Preboot                 1.9 GB     disk1s2
   3:                APFS Volume Recovery                1.1 GB     disk1s3
   4:                APFS Volume Macintosh HD            9.1 GB     disk1s4
   5:              APFS Snapshot com.apple.os.update-... 9.1 GB     disk1s4s1
   6:                APFS Volume VM                      1.1 MB     disk1s8
diskutil ap list
APFS Container (1 found)
|
+-- Container disk1 473AD281-0FBB-46A7-AF60-1D3CF261C17A
    ====================================================
    APFS Container Reference:     disk1
    Size (Capacity Ceiling):      250685575168 B (250.7 GB)
    Capacity In Use By Volumes:   29522989056 B (29.5 GB) (11.8% used)
    Capacity Not Allocated:       221162586112 B (221.2 GB) (88.2% free)
    |
    +-< Physical Store disk0s2 BFC482DA-948E-4798-BD79-BD6EF755CAF1
    |   -----------------------------------------------------------
    |   APFS Physical Store Disk:   disk0s2
    |   Size:                       250685575168 B (250.7 GB)
    |
    +-> Volume disk1s1 2602951E-885E-422A-AF58-A5E06429ADA9
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s1 (Data)
    |   Name:                      Macintosh HD - Données - Données (Case-insensitive)
    |   Mount Point:               /System/Volumes/Data
    |   Capacity Consumed:         17304494080 B (17.3 GB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s2 475BF935-6F41-4B77-9DA2-58ABA1029E56
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s2 (Preboot)
    |   Name:                      Preboot (Case-insensitive)
    |   Mount Point:               /System/Volumes/Preboot
    |   Capacity Consumed:         1857814528 B (1.9 GB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s3 BA08A797-DF51-4579-BFB6-D434A90394E4
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s3 (Recovery)
    |   Name:                      Recovery (Case-insensitive)
    |   Mount Point:               Not Mounted
    |   Capacity Consumed:         1146724352 B (1.1 GB)
    |   Sealed:                    No
    |   FileVault:                 No
    |
    +-> Volume disk1s4 E1D2F8B3-1530-4DEF-A2A9-141EB079FF40
    |   ---------------------------------------------------
    |   APFS Volume Disk (Role):   disk1s4 (System)
    |   Name:                      Macintosh HD (Case-insensitive)
    |   Mount Point:               Not Mounted
    |   Capacity Consumed:         9073442816 B (9.1 GB)
    |   Sealed:                    Yes
    |   FileVault:                 No
    |   |
    |   Snapshot:                  66132C6B-6865-4FE7-8703-F40E43FF76EA
    |   Snapshot Disk:             disk1s4s1
    |   Snapshot Mount Point:      /
    |   Snapshot Sealed:           Yes
    |
    +-> Volume disk1s8 E6040925-004F-4C95-BE9B-855AC44AF8B3
        ---------------------------------------------------
        APFS Volume Disk (Role):   disk1s8 (VM)
        Name:                      VM (Case-insensitive)
        Mount Point:               /System/Volumes/VM
        Capacity Consumed:         1069056 B (1.1 MB)
        Sealed:                    No
        FileVault:                 No
 
	