@macomaniac Je viens de copier le tout! Si jamais tu veux qu'on se fasse un partage d'écran pour que ce soit plus facile, je suis partante  Merci pour toute ton aide, super apprécié!
 Merci pour toute ton aide, super apprécié!
	
		
			
		
		
	
				
			/dev/disk4 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk4
   1:                        EFI EFI                     209.7 MB   disk4s1
   2:                  Apple_HFS Giuseppe 640            749.8 GB   disk4s2diskutil resizeVolume disk4s2 740g jhfs+ CLE 0bMBP-di-Giuseppe:~ giuseppe$ diskutil resizeVolume disk4s2 740g jhfs+ CLE 0b
Resizing to 740000000000 bytes and adding 1 partition
Started partitioning on disk4s2 Giuseppe 640
Verifying the disk
Verifying file system
Volume was successfully unmounted
Performing fsck_hfs -fn -x /dev/rdisk4s2
Checking Journaled HFS Plus volume
Detected a case-sensitive volume
Checking extents overflow file
Checking catalog file
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Checking volume bitmap
Checking volume information
The volume Giuseppe 640 appears to be OK
File system check exit code is 0
Restoring the original state found as mounted
Resizing
Shrinking file system
Modifying partition map
Initialized /dev/rdisk4s3 as a 9 GB case-insensitive HFS Plus volume with a 8192k journal
Mounting disk
Finished partitioning on disk4s2 Giuseppe 640
/dev/disk4 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk4
   1:                        EFI EFI                     209.7 MB   disk4s1
   2:                  Apple_HFS Giuseppe 640            740.0 GB   disk4s2
   3:                  Apple_HFS CLE                     9.7 GB     disk4s3
MBP-di-Giuseppe:~ giuseppe$sudo /Vol*/Install*/Install*/C*/R*/createinstallmedia --volume /Vol*/CLE --applicationpath /Vol*/Install*/Install* --nointeractionNon : la commande n'adresse que le petit volume CLE que tu as créé sur le disque du DDE > pas le volume Giuseppe 640.
Last login: Wed Mar 25 17:40:09 on ttys000
MBP-di-Giuseppe:~ giuseppe$ diskutil list
/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         121.3 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         121.0 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            79.0 GB    disk1s1
   2:                APFS Volume Preboot                 51.4 MB    disk1s2
   3:                APFS Volume Recovery                510.4 MB   disk1s3
   4:                APFS Volume VM                      4.3 GB     disk1s4
/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk2s2
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk3
   1:                        EFI EFI                     209.7 MB   disk3s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk3s2
/dev/disk4 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk4
   1:                        EFI EFI                     209.7 MB   disk4s1
   2:                  Apple_HFS Giuseppe 640            740.0 GB   disk4s2
   3:                  Apple_HFS Install OS X Yosemite   9.7 GB     disk4s3
MBP-di-Giuseppe:~ giuseppe$ df -H
Filesystem      Size   Used  Avail Capacity iused               ifree %iused  Mounted on
/dev/disk1s1    121G    79G    37G    69%  898512 9223372036853877295    0%   /
devfs           201k   201k     0B   100%     680                   0  100%   /dev
/dev/disk1s4    121G   4.3G    37G    11%       4 9223372036854775803    0%   /private/var/vm
map -hosts        0B     0B     0B   100%       0                   0  100%   /net
map auto_home     0B     0B     0B   100%       0                   0  100%   /home
/dev/disk2s2    5.9G   5.8G    98M    99%     452          4294966827    0%   /Volumes/Installer Yosemite
/dev/disk3s2    5.9G   5.8G    98M    99%     450          4294966829    0%   /Volumes/Installer Yosemite 1
/dev/disk4s3    9.7G   5.8G   3.9G    60%     507          4294966772    0%   /Volumes/Install OS X Yosemite
/dev/disk4s2    740G   145G   595G    20%    6129          4294961150    0%   /Volumes/Giuseppe 640
MBP-di-Giuseppe:~ giuseppe$ diskutil resizeVolume disk4s2 740g jhfs+ CLE 0b
Resizing to 740000000000 bytes and adding 1 partition
Started partitioning on disk4s2 Giuseppe 640
Error: -69743: The new size must be different than the existing size
MBP-di-Giuseppe:~ giuseppe$ sudo /Vol*/Install*/Install*/C*/R*/createinstallmedia --volume /Vol*/CLE --applicationpath /Vol*/Install*/Install* --nointeraction
Password:
/Vol*/CLE is not a valid volume mount point.
MBP-di-Giuseppe:~ giuseppe$ sudo /Vol*/Install*/Install*/C*/R*/createinstallmedia --volume /Vol*/CLE --applicationpath /Vol*/Install*/Install* --nointeraction
/Vol*/CLE is not a valid volume mount point.
MBP-di-Giuseppe:~ giuseppe$   3:                  Apple_HFS Install OS X Yosemite   9.7 GB     disk4s3bless --info /Vol*/"Install OS X Yosemite"Tu as déjà un volume configuré comme volume d'installation démarrable de Yosemite :
Bloc de code:3: Apple_HFS Install OS X Yosemite 9.7 GB disk4s3
- si je comprends bien : tu avais passé ma longue commande de configuration une 1ère fois > puis tu as cherché à la repasser une seconde fois ?
Passe la commande (copier-coller) :
Bloc de code:bless --info /Vol*/"Install OS X Yosemite"
- qui affiche le chemin de démarrage du volume Install OS X Yosemite
Poste le retour.
MBP-di-Giuseppe:~ giuseppe$ bless --info /Vol*/"Install OS X Yosemite"
No mount point for /Vol*/Install OS X Yosemite
Can't get mount point for /Vol*/Install OS X Yosemite
MBP-di-Giuseppe:~ giuseppe$@macomaniac Exactement! J'ai vu le mot Erasing dans le code et j'ai juste déconnecté mon hard disk par peur de tout perdre.Bloc de code:MBP-di-Giuseppe:~ giuseppe$ bless --info /Vol*/"Install OS X Yosemite" No mount point for /Vol*/Install OS X Yosemite Can't get mount point for /Vol*/Install OS X Yosemite MBP-di-Giuseppe:~ giuseppe$
diskutil listLast login: Wed Mar 25 17:40:09 on ttys000
MBP-di-Giuseppe:~ giuseppe$ diskutil list
/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         121.3 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         121.0 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            79.0 GB    disk1s1
   2:                APFS Volume Preboot                 51.4 MB    disk1s2
   3:                APFS Volume Recovery                510.4 MB   disk1s3
   4:                APFS Volume VM                      4.3 GB     disk1s4
/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk2s2
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk3
   1:                        EFI EFI                     209.7 MB   disk3s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk3s2
/dev/disk4 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk4
   1:                        EFI EFI                     209.7 MB   disk4s1
   2:                  Apple_HFS Giuseppe 640            740.0 GB   disk4s2
   3:                  Apple_HFS Install OS X Yosemite   9.7 GB     disk4s3
MBP-di-Giuseppe:~ giuseppe$ df -H
Filesystem      Size   Used  Avail Capacity iused               ifree %iused  Mounted on
/dev/disk1s1    121G    79G    37G    69%  898512 9223372036853877295    0%   /
devfs           201k   201k     0B   100%     680                   0  100%   /dev
/dev/disk1s4    121G   4.3G    37G    11%       4 9223372036854775803    0%   /private/var/vm
map -hosts        0B     0B     0B   100%       0                   0  100%   /net
map auto_home     0B     0B     0B   100%       0                   0  100%   /home
/dev/disk2s2    5.9G   5.8G    98M    99%     452          4294966827    0%   /Volumes/Installer Yosemite
/dev/disk3s2    5.9G   5.8G    98M    99%     450          4294966829    0%   /Volumes/Installer Yosemite 1
/dev/disk4s3    9.7G   5.8G   3.9G    60%     507          4294966772    0%   /Volumes/Install OS X Yosemite
/dev/disk4s2    740G   145G   595G    20%    6129          4294961150    0%   /Volumes/Giuseppe 640
MBP-di-Giuseppe:~ giuseppe$ diskutil resizeVolume disk4s2 740g jhfs+ CLE 0b
Resizing to 740000000000 bytes and adding 1 partition
Started partitioning on disk4s2 Giuseppe 640
Error: -69743: The new size must be different than the existing size
MBP-di-Giuseppe:~ giuseppe$ sudo /Vol*/Install*/Install*/C*/R*/createinstallmedia --volume /Vol*/CLE --applicationpath /Vol*/Install*/Install* --nointeraction
Password:
/Vol*/CLE is not a valid volume mount point.
MBP-di-Giuseppe:~ giuseppe$ sudo /Vol*/Install*/Install*/C*/R*/createinstallmedia --volume /Vol*/CLE --applicationpath /Vol*/Install*/Install* --nointeraction
/Vol*/CLE is not a valid volume mount point.
MBP-di-Giuseppe:~ giuseppe$ bless --info /Vol*/"Install OS X Yosemite"
No mount point for /Vol*/Install OS X Yosemite
Can't get mount point for /Vol*/Install OS X Yosemite
MBP-di-Giuseppe:~ giuseppe$
MBP-di-Giuseppe:~ giuseppe$ bless --info /Vol*/"Install OS X Yosemite"
No mount point for /Vol*/Install OS X Yosemite
Can't get mount point for /Vol*/Install OS X Yosemite
MBP-di-Giuseppe:~ giuseppe$ diskutil list
/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         121.3 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         121.0 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            79.1 GB    disk1s1
   2:                APFS Volume Preboot                 51.4 MB    disk1s2
   3:                APFS Volume Recovery                510.4 MB   disk1s3
   4:                APFS Volume VM                      4.3 GB     disk1s4
/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk2s2
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk3
   1:                        EFI EFI                     209.7 MB   disk3s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk3s2
MBP-di-Giuseppe:~ giuseppe$Last login: Thu Mar 26 10:11:54 on ttys000
MBP-di-Giuseppe:~ giuseppe$ diskutil list
/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         121.3 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         121.0 GB   disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            79.1 GB    disk1s1
   2:                APFS Volume Preboot                 51.4 MB    disk1s2
   3:                APFS Volume Recovery                510.4 MB   disk1s3
   4:                APFS Volume VM                      4.3 GB     disk1s4
/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk2s2
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +6.2 GB     disk3
   1:                        EFI EFI                     209.7 MB   disk3s1
   2:                  Apple_HFS Installer Yosemite      5.9 GB     disk3s2
/dev/disk4 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk4
   1:                        EFI EFI                     209.7 MB   disk4s1
   2:                  Apple_HFS Giuseppe 640            740.0 GB   disk4s2
   3:                  Apple_HFS Install OS X Yosemite   9.7 GB     disk4s3
MBP-di-Giuseppe:~ giuseppe$diskutil eraseVolume jhfs+ CLE disk4s3MBP-di-Giuseppe:~ giuseppe$ diskutil eraseVolume jhfs+ CLE disk4s3
Started erase on disk4s3 Install OS X Yosemite
Unmounting disk
Erasing
Initialized /dev/rdisk4s3 as a 9 GB case-insensitive HFS Plus volume with a 8192k journal
Mounting disk
Finished erase on disk4s3 CLE
MBP-di-Giuseppe:~ giuseppe$sudo /Vol*/Install*/Install*/C*/R*/createinstallmedia --volume /Vol*/CLE --applicationpath /Vol*/Install*/Install* --nointeractionMBP-di-Giuseppe:~ giuseppe$ sudo /Vol*/Install*/Install*/C*/R*/createinstallmedia --volume /Vol*/CLE --applicationpath /Vol*/Install*/Install* --nointeraction
Password:
Erasing Disk: 0%... 10%... 20%... 30%...100%...
Copying installer files to disk...
Copy complete.
Making disk bootable...
Copying boot files...
Copy complete.
Done.
MBP-di-Giuseppe:~ giuseppe$Super! Je ne suis pas certaine de comprendre ce que je dois faire... Voici ce que je vois dans mon Finder. J'ai comme 3 fichiers Installer Yosemite sous le hard disk Giuseppe, mais ils sont datés du 4 mars...Hé ! hé ! --> ça a marché ce coup-ci. Ton DDE porte actuellement un petit volume intitulé : Install OS X Yosemite => qui est l'équivalent de celui d'une clé d'installation de cet OS.
- tu peux t'en servir pour démarrer dessus via la touche "alt" qui affiche l'écran de choix des volumes démarrables.

 
	