M 
		
				
				
			
		Passe alors la commande :
Bloc de code:diskutil list
- et poste le tableau des disques.
 
Last login: Sat Oct 12 15:20:32 on ttys000
macbook-air:~ alexb$ 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               84.7 GB    disk1s1
   2:                APFS Volume Preboot                 45.7 MB    disk1s2
   3:                APFS Volume Recovery                510.4 MB   disk1s3
   4:                APFS Volume VM                      1.1 GB     disk1s4
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *2.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS UNRATED AB              1.8 TB     disk2s2
   3:                  Apple_HFS Clone                   199.9 GB   disk2s3
macbook-air:~ alexb$
	tmutil listlocalsnapshots /
	86,3 d'occupation totale du Conteneur de 121 Go => 34,7 Go d'espace libre. Suffisant pour une installation.
Passe quand même la commande (copier-coller) :
Bloc de code:tmutil listlocalsnapshots /
- qui liste les snapshots existants
 
Poste le retour.
Last login: Sat Oct 12 15:23:14 on ttys001
macbook-air:~ alexb$ tmutil listlocalsnapshots /
com.apple.TimeMachine.2019-10-12-114008
com.apple.TimeMachine.2019-10-12-131136
macbook-air:~ alexb$
	sudo tmutil thinlocalsnapshots / 99000000000000 4 ; say 'ENFIN TERMINÉ LA PURGE'
	diskutil list
	Whaaa... Tu en as encore 2 ! ->
- a) pour fermer le robinet à snapshots : va à Menu  > Préférences Système > Time Machine => décoche l'option : "Sauvegarder automatiquement".
----------
- b) pour supprimer les snapshots > passe la commande (copier-coller) :Bloc de code:sudo tmutil thinlocalsnapshots / 99000000000000 4 ; say 'ENFIN TERMINÉ LA PURGE'
- à validation > une demande de password s'affiche (commande sudo) --> tape ton mot-de-passe de session admin en aveugle - aucun caractère ne se montrant à la frappe - et revalide
 ----------
- la commande supprime en lot les snapshots. Attends d'entendre une voix déclarer : "Enfin ! terminé la purge..." en signal de fin.
 
Cela fait > repasse la commande :
Bloc de code:diskutil list
- et reposte le tableau des disques.
 
Last login: Sat Oct 12 15:27:32 on ttys000
macbook-air:~ alexb$ sudo tmutil thinlocalsnapshots / 99000000000000 4 ; say 'ENFIN TERMINÉ LA PURGE'
Password:
Thinned local snapshots:
com.apple.TimeMachine.2019-10-12-131136
com.apple.TimeMachine.2019-10-12-114008
macbook-air:~ alexb$ 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               83.3 GB    disk1s1
   2:                APFS Volume Preboot                 45.7 MB    disk1s2
   3:                APFS Volume Recovery                510.4 MB   disk1s3
   4:                APFS Volume VM                      1.1 GB     disk1s4
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *2.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS UNRATED AB              1.8 TB     disk2s2
   3:                  Apple_HFS Clone                   199.9 GB   disk2s3
macbook-air:~ alexb$
	MerciTu as gagné 1,4 Go -->
- tu peux lancer l'installation de Catalina.
-bash-3.2# 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 disk2         121.0 GB   disk0s2
/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 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.0 GB   disk2
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            105.3 GB   disk2s1
   2:                APFS Volume Preboot                 45.0 MB    disk2s2
   3:                APFS Volume Recovery                510.5 MB   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               +524.3 KB   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               +6.3 MB     disk19
/dev/disk20 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk20
/dev/disk21 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk21
-bash-3.2# diskutil list disk2
/dev/disk2 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.0 GB   disk2
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            105.3 GB   disk2s1
   2:                APFS Volume Preboot                 45.0 MB    disk2s2
   3:                APFS Volume Recovery                510.5 MB   disk2s3
   4:                APFS Volume VM                      2.1 GB     disk2s4
-bash-3.2# diskutil list disk1
/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
-bash-3.2#
	diskutil ap listSnaps disk2s1
	-bash-3.2# diskutil ap listSnaps disk2s1
Snapshot for disk2s1 (1 found)
|
+-- Name: com.apple.TimeMachine.2019-10-12-151900
    XID:  5683505
    NOTE: This snapshot sets the minimal allowed size of APFS Container disk2
-bash-3.2#
	tmutil listlocalsnapshots /
	com.apple.TimeMachine.2019-10-12-175317
	sudo tmutil deletelocalsnapshots 2019-10-12-175317
	df -H /
	ls /