diskutil list 
	 
	-bash-3.2# diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk2         121.1 GB   disk0s2
/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 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.1 GB   disk2
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            54.8 GB    disk2s1
   2:                APFS Volume Preboot                 43.6 MB    disk2s2
   3:                APFS Volume Recovery                1.0 GB     disk2s3
   4:                APFS Volume VM                      2.1 GB     disk2s4
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +5.2 MB     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               +524.3 KB   disk6
/dev/disk7 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     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               +12.6 MB    disk10
/dev/disk11 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +4.2 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               +2.1 MB     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               +524.3 KB   disk15
/dev/disk16 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +1.0 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               +6.3 MB     disk18
/dev/disk19 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk19
/dev/disk20 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk20
-bash-3.2#diskutil info /Volumes/Mac*
ls /Volumes/Mac*
bless --info /Volumes/Mac*diskutil info /Volumes/Mac*
ls /Volumes/Mac*
bless --info /Volumes/Mac*-bash-3.2# diskutil info /Volumes/Mac*
   Device Identifier:        disk2s1
   Device Node:              /dev/disk2s1
   Whole:                    No
   Part of Whole:            disk2
   Volume Name:              Macintosh HD
   Mounted:                  Yes
   Mount Point:              /Volumes/Macintosh HD
   Partition Type:           41504653-0000-11AA-AA11-00306543ECAC
   File System Personality:  APFS
   Type (Bundle):            apfs
   Name (User Visible):      APFS
   Owners:                   Enabled
   OS Can Be Installed:      Yes
   Booter Disk:              disk2s2
   Recovery Disk:            disk2s3
   Media Type:               Generic
   Protocol:                 PCI
   SMART Status:             Verified
   Volume UUID:              D6C6E6C2-7C16-4250-961D-6BA079043A46
   Disk / Partition UUID:    D6C6E6C2-7C16-4250-961D-6BA079043A46
   Disk Size:                121.1 GB (121123069952 Bytes) (exactly 236568496 512-Byte-Units)
   Device Block Size:        4096 Bytes
   Volume Total Space:       121.1 GB (121123069952 Bytes) (exactly 236568496 512-Byte-Units)
   Volume Used Space:        58.2 GB (58161799168 Bytes) (exactly 113597264 512-Byte-Units) (48.0%)
   Volume Free Space:        63.0 GB (62961270784 Bytes) (exactly 122971232 512-Byte-Units) (52.0%)
   Allocation Block Size:    4096 Bytes
   Read-Only Media:          No
   Read-Only Volume:         No
   Device Location:          Internal
   Removable Media:          Fixed
   Solid State:              Yes
   Hardware AES Support:     No
-bash-3.2#-bash-3.2# ls /Volumes/Mac*
.DS_Store
.DocumentRevisions-V100
.IAProductInfo
.PKInstallSandboxManager-SystemSoftware
.Spotlight-V100
.file
.fseventsd
.vol
Applications
Historique de Programme d’installation 1-Nov-2018.txt
Library
Network
System
Users
Volumes
bin
cores
dev
etc
home
installer.failurerequests
macOS Install Data
net
private
sbin
tmp
usr
var
-bash-3.2#-bash-3.2# bless --info /Volumes/Mac*
        1557 => Blessed System File is <Preboot>/D6C6E6C2-7C16-4250-961D-6BA079043A46/com.apple.installer/boot.efi
         361 => Blessed System Folder is <Preboot>/D6C6E6C2-7C16-4250-961D-6BA079043A46/com.apple.installer
The blessed volume in this APFS container is "/Volumes/Macintosh HD"
-bash-3.2#bless --folder /Volumes/"Macintosh HD"/System/Library/CoreServices --file /Volumes/"Macintosh HD"/System/Library/CoreServices/boot/efibless --info /Volumes/Mac* 
	