sw_vers -productVersiondatedate 0318170020-bash-3.2# diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage Macintosh HD            499.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +2.1 GB     disk1
   1:                  Apple_HFS OS X Base System        2.0 GB     disk1s1
/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +5.2 MB     disk2
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk3
/dev/disk4 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   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               +2.1 MB     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               +12.6 MB    disk9
/dev/disk10 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +4.2 MB     disk10
/dev/disk11 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +1.0 MB     disk11
/dev/disk12 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 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
/dev/disk17 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +6.3 MB     disk17
/dev/disk18 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk18
/dev/disk19 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk19
/dev/disk20 (internal, virtual):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           +498.9 GB   disk20
                                 Logical Volume on disk0s2
                                 1931D518-32AE-41E7-AF18-24727CE92999
                                 Unlocked Encrypted
-bash-3.2# diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group A0480B40-5C75-4DED-A82D-7174EC744C8C
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         499248103424 B (499.2 GB)
    Free Space:   0 B (0 B)
    |
    +-< Physical Volume 3D14B952-E265-4542-AC43-80D09B7C1AA4
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     499248103424 B (499.2 GB)
    |
    +-> Logical Volume Family 83FFB75B-C1A3-4499-8A95-B840169469C6
        ----------------------------------------------------------
        Encryption Type:         AES-XTS
        Encryption Status:       Unlocked
        Conversion Status:       Complete
        High Level Queries:      Fully Secure
        |                        Passphrase Required
        |                        Accepts New Users
        |                        Has Visible Users
        |                        Has Volume Key
        |
        +-> Logical Volume 1931D518-32AE-41E7-AF18-24727CE92999
            ---------------------------------------------------
            Disk:                  disk20
            Status:                Online
            Size (Total):          498895781888 B (498.9 GB)
            Revertible:            Yes (unlock and decryption required)
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS
-bash-3.2# ls /Volumes/"Macintosh HD"
.DS_Store                Network
.DocumentRevisions-V100            System
.OSInstallerMessages            Users
.PKInstallSandboxManager-SystemSoftware    Volumes
.Spotlight-V100                bin
.file                    cores
.fseventsd                dev
.hotfiles.btree                etc
.vol                    home
Applications                installer.failurerequests
CoreSyncInstall.log            net
CoreSyncInstall.log.0.gz        private
CoreSyncInstall.log.1.gz        sbin
CoreSyncInstall.log.2.gz        tmp
CoreSyncInstall.log.3.gz        usr
CoreSyncInstall.log.4.gz        var
Informations sur l’utilisateur        vm
Library
-bash-3.2# diskutil info /Volumes/"Macintosh HD"
   Device Identifier:        disk20
   Device Node:              /dev/disk20
   Whole:                    Yes
   Part of Whole:            disk20
   Device / Media Name:      APPLE HDD TOSHIBA MK5065GSXF
   Volume Name:              Macintosh HD
   Mounted:                  Yes
   Mount Point:              /Volumes/Macintosh HD
   Content (IOContent):      Apple_HFS
   File System Personality:  Journaled HFS+
   Type (Bundle):            hfs
   Name (User Visible):      Mac OS Extended (Journaled)
   Journal:                  Journal size 40960 KB at offset 0x49c4a000
   Owners:                   Enabled
   OS Can Be Installed:      Yes
   Booter Disk:              disk0s3
   Recovery Disk:            disk0s3
   Media Type:               Generic
   Protocol:                 SATA
   SMART Status:             Verified
   Volume UUID:              4A670263-895D-3806-9FE2-9D5126B63629
   Disk / Partition UUID:    1931D518-32AE-41E7-AF18-24727CE92999
   Disk Size:                498.9 GB (498895781888 Bytes) (exactly 974405824 512-Byte-Units)
   Device Block Size:        512 Bytes
   Volume Total Space:       498.9 GB (498895781888 Bytes) (exactly 974405824 512-Byte-Units)
   Volume Used Space:        317.7 GB (317655883776 Bytes) (exactly 620421648 512-Byte-Units) (63.7%)
   Volume Free Space:        181.2 GB (181239898112 Bytes) (exactly 353984176 512-Byte-Units) (36.3%)
   Allocation Block Size:    4096 Bytes
   Read-Only Media:          No
   Read-Only Volume:         No
   Device Location:          Internal
   Removable Media:          Fixed
   Solid State:              No
   Virtual:                  Yes
   Hardware AES Support:     No
   This disk is a Core Storage Logical Volume (LV).  Core Storage Information:
   LV UUID:                  1931D518-32AE-41E7-AF18-24727CE92999
   LVF UUID:                 83FFB75B-C1A3-4499-8A95-B840169469C6
   LVG UUID:                 A0480B40-5C75-4DED-A82D-7174EC744C8C
   PV UUID (disk):           3D14B952-E265-4542-AC43-80D09B7C1AA4 (disk0s2)
   Fusion Drive:             No
   Encrypted:                Yes
-bash-3.2#Bonjour Alice
Le volume Macintosh HD était verrouillé par FileVault et tu l'as donc remonté dans l'Utilitaire de disque.
- pas d'anomalies formelles d'après tes informations : volume monté en lecture & écriture > état smart vérifié > réinstallable. 318 Go d'occupation.
Quel est l'OS actuellement installé ? - High Sierra ? Et comment se manifeste le plantage de démarrage à l'écran ?
 
	