diskutil list
-bash-3.2# 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 YOUSSA 999.9 GB disk0s2
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_HFS Macintosh HD 499.2 GB disk1s2
3: Apple_Boot Recovery HD 650.0 MB disk1s3
/dev/disk2 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme +2.1 GB disk2
1: Apple_HFS OS X Base System 2.0 GB disk2s1
/dev/disk3 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *2.0 TB disk3
1: Windows_NTFS TOSHIBA EXT 2.0 TB disk3s1
/dev/disk4 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +5.2 MB disk4
/dev/disk5 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk5
/dev/disk6 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk6
/dev/disk7 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk7
/dev/disk8 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk8
/dev/disk9 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk9
/dev/disk10 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +6.3 MB disk10
/dev/disk11 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB disk11
/dev/disk12 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +1.0 MB disk12
/dev/disk13 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk13
/dev/disk14 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk14
/dev/disk15 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +1.0 MB disk15
/dev/disk16 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +6.3 MB disk16
-bash-3.2#
diskutil info disk0s2
-bash-3.2# diskutil info disk0s2
Device Identifier: disk0s2
Device Node: /dev/disk0s2
Whole: No
Part of Whole: disk0
Device / Media Name: Untitled 2
Volume Name: YOUSSA
Mounted: Yes
Mount Point: /Volumes/YOUSSA
File System Personality: Journaled HFS+
Type (Bundle): hfs
Name (User Visible): Mac OS Extended (Journaled)
Journal: Journal size 81920 KB at offset 0x1d1c000
Owners: Enabled
Partition Type: Apple_HFS
OS Can Be Installed: Yes
Media Type: Generic
Protocol: SATA
SMART Status: Verified
Volume UUID: CFFA1447-013B-355A-A5C3-C78E0F88B6F5
Disk / Partition UUID: B80D9611-F319-4A23-B083-A1804A631343
Total Size: 999.9 GB (999860912128 Bytes) (exactly 1952853344 512-Byte-Units)
Volume Free Space: 999.2 GB (999197233152 Bytes) (exactly 1951557096 512-Byte-Units)
Device Block Size: 512 Bytes
Allocation Block Size: 4096 Bytes
Read-Only Media: No
Read-Only Volume: No
Device Location: Internal
Removable Media: No
Solid State: No
-bash-3.2#
mkdir -v /Volumes/YOUSSA/Sauvegarde
diskutil info disk1s2
-bash-3.2# diskutil info disk1s2
Device Identifier: disk1s2
Device Node: /dev/disk1s2
Whole: No
Part of Whole: disk1
Device / Media Name: Macintosh HD
Volume Name: Macintosh HD
Mounted: Yes
Mount Point: /Volumes/Macintosh HD
File System Personality: HFS+
Type (Bundle): hfs
Name (User Visible): Mac OS Extended
Owners: Enabled
Partition Type: Apple_HFS
OS Can Be Installed: No
Recovery Disk: disk1s3
Media Type: Generic
Protocol: USB
SMART Status: Not Supported
Volume UUID: 87297013-3C81-3C1B-9955-961F351E03B3
Disk / Partition UUID: 2EEE5CB9-ECE5-4AC6-ADE4-2A817E9FCCA2
Total Size: 499.2 GB (499248103424 Bytes) (exactly 975093952 512-Byte-Units)
Volume Free Space: 330.7 GB (330696192000 Bytes) (exactly 645891000 512-Byte-Units)
Device Block Size: 512 Bytes
Allocation Block Size: 4096 Bytes
Read-Only Media: No
Read-Only Volume: Yes
Device Location: External
Removable Media: No
-bash-3.2#
mkdir /Volumes/YOUSSA/Sauvegarde
Si si il est branché.Tu ne branches pas le Mac au secteur ?
Et si tu remets le HDD en branchement USB externe => tu arrives à démarrer via ⌘R sur l'OS de secours ?