diskutil eraseVolume jhfs+ "Macintosh HD" disk0 ; diskutil list disk0-bash-3.2# diskutil eraseVolume jhfs+ "Macintosh HD" disk0 ; diskutil list disk0
Started erase on disk0
Unmounting disk
Error: -69888: Couldn't unmount disk
/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_HFS OS X Base System        499.2 GB   disk0s2
-bash-3.2#diskutil umountDisk force disk0diskutil eraseDisk jhfs+ "Macintosh HD" gpt disk0 ; diskutil list disk0-bash-3.2# diskutil eraseDisk jhfs+ "Macintosh HD" gpt disk0 ; diskutil list disk0
Started erase on disk0
Unmounting disk
Creating the partition map
Waiting for partitions to activate
Formatting disk0s2 as Mac OS Extended (Journaled) with name Macintosh HD
Initialized /dev/rdisk0s2 as a 465 GB case-insensitive HFS Plus volume with a 40960k journal
Mounting disk
Finished erase on disk0
/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_HFS Macintosh HD            499.8 GB   disk0s2
-bash-3.2#-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 macOS 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               +524.3 KB   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
Offline
                                 Logical Volume macOS Base System on disk0s2
                                 405E7324-61E1-4D93-8492-9FBC5FE7479B
                                 Locked Encrypted
-bash-3.2#Offline
                                 Logical Volume macOS Base System on disk0s2
                                 405E7324-61E1-4D93-8492-9FBC5FE7479B
                                 Locked Encrypteddiskutil cs list-bash-3.2# diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 29B9A689-3031-41E4-AEB8-DFBE49C73758
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         499248103424 B (499.2 GB)
    Free Space:   0 B (0 B)
    |
    +-< Physical Volume B224F075-8C04-4C16-928B-8E83F7A7ADFB
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     499248103424 B (499.2 GB)
    |
    +-> Logical Volume Family 8D0E8C22-F474-443C-8E66-72C6C037725B
        ----------------------------------------------------------
        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 405E7324-61E1-4D93-8492-9FBC5FE7479B
            ---------------------------------------------------
            Disk:                  disk21
            Status:                Online
            Size (Total):          498895781888 B (498.9 GB)
            Revertible:            Yes (unlock and decryption required)
            LV Name:               macOS Base System
            Volume Name:           macOS Base System
            Content Hint:          Apple_HFS
-bash-3.2#diskutil cs deleteLVG 29B9A689-3031-41E4-AEB8-DFBE49C73758-bash-3.2# diskutil cs deleteLVG 29B9A689-3031-41E4-AEB8-DFBE49C73758
Started CoreStorage operation
Unmounting Logical Volumes
Destroying Logical Volume Group
Erasing disk0s2
Initialized /dev/rdisk0s2 as a 465 GB case-insensitive HFS Plus volume with a 40960k journal
Mounting disk
Finished CoreStorage operation
-bash-3.2#diskutil rename disk0s2 "Macintosh HD" 
	