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Donc High Sierra. Est-ce que tu as de ton côté un installateur de High Sierra (6 Go) qui permettra de lancer une réinstallation après effacement du HDD ?
diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group D4BDDF13-1C0C-4A52-AB48-9D91F0974578
=========================================================
Name: Macintosh HD
Status: Online
Size: 499248103424 B (499.2 GB)
Free Space: 8486912 B (8.5 MB)
|
+-< Physical Volume BCC9D26D-2DBA-4E4B-B8E2-4A5AFB3E8CE0
| ----------------------------------------------------
| Index: 0
| Disk: disk3s2
| Status: Online
| Size: 499248103424 B (499.2 GB)
|
+-> Logical Volume Family 1462362E-8101-4C01-88E9-482A7B71FF8F
----------------------------------------------------------
Encryption Type: None
|
+-> Logical Volume 68567AA4-1D0A-4680-AB35-5CCB485226F1
---------------------------------------------------
Disk: disk4
Status: Online
Size (Total): 498887294976 B (498.9 GB)
Revertible: Yes (no decryption required)
LV Name: OS X Base System
Volume Name: OS X Base System
Content Hint: Apple_HFS
diskutil coreStorage deleteLVG D4BDDF13-1C0C-4A52-AB48-9D91F0974578
diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 999.3 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme +24.3 MB disk1
1: Apple_partition_map 32.3 KB disk1s1
2: Apple_HFS Flash Player 24.2 MB disk1s2
/dev/disk3 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk3
1: EFI EFI 209.7 MB disk3s1
2: Apple_HFS Untitled 499.2 GB disk3s2
/dev/disk5 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme +24.3 MB disk5
1: Apple_partition_map 32.3 KB disk5s1
2: Apple_HFS Flash Player 24.2 MB disk5s2
/dev/disk3 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk3
1: EFI EFI 209.7 MB disk3s1
2: Apple_HFS Untitled 499.2 GB disk3s2
diskutil rename disk3s2 "Macintosh HDD"
- à la fin de l'installation > il va y avoir la série de panneaux de paramétrage du Mac (Pays etc.) > puis à la fin de création d'un 1er compte Admin. Tu penses pouvoir le faire à la place de ta sœur ?