M 
		
				
				
			
		Mac-Pro-de-Pascal:~ pascalgorand$ diskutil list
/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         960.2 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         960.0 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +960.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume DD Bureau               918.5 GB   disk1s1
   2:                APFS Volume Preboot                 42.9 MB    disk1s2
   3:                APFS Volume Recovery                510.6 MB   disk1s3
   4:                APFS Volume VM                      2.1 GB     disk1s4
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *250.1 GB   disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                 Apple_APFS Container disk4         249.8 GB   disk2s2
/dev/disk4 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +249.8 GB   disk4
                                 Physical Store disk2s2
   1:                APFS Volume DD EXTERNE              111.4 GB   disk4s1
   2:                APFS Volume Preboot                 54.0 MB    disk4s2
   3:                APFS Volume Recovery                510.4 MB   disk4s3
   4:                APFS Volume VM                      25.8 GB    disk4s4
	sudo gdisk /dev/disk0
	Mac-Pro-de-Pascal:~ pascalgorand$ sudo gdisk /dev/disk0
Password:
GPT fdisk (gdisk) version 1.0.8
Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
NOTE: Write test failed with error number 13. It will be impossible to save
changes to this disk's partition table!
You may need to deactivate System Integrity Protection to use this program. See
https://www.quora.com/How-do-I-turn-off-the-rootless-in-OS-X-El-Capitan-10-11
for more information.
Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help):
	v
	x
	z
	Expert command (? for help): z
About to wipe out GPT on /dev/disk0. Proceed? (Y/N): Y
Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
Problem opening '/dev/disk0' for writing! Program will now terminate.
Blank out MBR? (Y/N):
	Problem opening '/dev/disk0' for writing! Program will now terminate.
	y
	diskutil list
	/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         960.2 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         960.0 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +960.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume DD Bureau               918.5 GB   disk1s1
   2:                APFS Volume Preboot                 42.9 MB    disk1s2
   3:                APFS Volume Recovery                510.6 MB   disk1s3
   4:                APFS Volume VM                      2.1 GB     disk1s4
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *250.1 GB   disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                 Apple_APFS Container disk3         249.8 GB   disk2s2
/dev/disk3 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +249.8 GB   disk3
                                 Physical Store disk2s2
   1:                APFS Volume DD EXTERNE              110.1 GB   disk3s1
   2:                APFS Volume Preboot                 54.0 MB    disk3s2
   3:                APFS Volume Recovery                510.4 MB   disk3s3
   4:                APFS Volume VM                      34.4 GB    disk3s4