Last login: Fri Mar 6 20:23:47 on console
iMac:~ imac$ diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *256.1 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 255.9 GB disk0s2
/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +255.9 GB disk1
Physical Store disk0s2
1: APFS Volume Preboot 23.4 MB disk1s2
2: APFS Volume Recovery 516.2 MB disk1s3
3: APFS Volume VM 20.5 KB disk1s4
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS GUILLAUME 499.2 GB disk2s2
3: Apple_Boot Recovery HD 650.0 MB disk2s3
iMac:~ imac$ sw_vers - productVersion
Usage: sw_vers [-productName|-productVersion|-buildVersion]
iMac:~ imac$ sw_vers -productVersion
10.13.6
iMac:~ imac$ diskutil eraseDisk apfs "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 APFS with name Macintosh HD
Mounting disk
Finished erase on disk0
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *256.1 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 255.9 GB disk0s2
iMac:~ imac$