10.15 Catalina MacOS CATALINA n'a pas pu être installé - espace libre insuffisant

[VinceR]

Bonjour,

Je rencontre un problème lié à la mise à jour de CATALINA sur mon macbook air (pas assez d'espace disque et aps de sauvegarde préalable). J'ai tenté de suivre les différentes réponses formulées dans le forum mais en vain (toujours pas assez d'espace disponible).
Voici les informations nécessaires à la résolution de mon problème :

-bash-3.2# diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk2 121.1 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 - +121.1 GB disk2
Physical Store disk0s2
1: APFS Volume Macintosh HD - Données 92.3 GB disk2s1
2: APFS Volume Preboot 153.4 MB disk2s2
3: APFS Volume Recovery 529.0 MB disk2s3
4: APFS Volume VM 2.1 GB disk2s4
5: APFS Volume Macintosh HD 10.7 GB disk2s5
/dev/disk3 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +10.5 MB disk3
/dev/disk4 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +10.5 MB 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 +524.3 KB disk7
/dev/disk8 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB 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 +524.3 KB disk10
/dev/disk11 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +12.6 MB disk11
/dev/disk12 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +4.2 MB disk12
/dev/disk13 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +1.0 MB disk13
/dev/disk14 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB 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 +2.1 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 +1.0 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 +6.3 MB disk20
/dev/disk21 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +6.3 MB disk21
/dev/disk22 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk22
/dev/disk23 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB disk23
-bash-3.2#

-bash-3.2# ls /Volumes/Mac*
/Volumes/Macintosh HD:
.DS_Store System opt
.VolumeIcon.icns Users private
.file Volumes sbin
.fseventsd bin tmp
.vol cores usr
Applications dev var
Library etc
/Volumes/Macintosh HD - Données:
.DS_Store .installer-compatibility
.DocumentRevisions-V100 .vol
.HFS+ Private Directory Data? Informations sur l’utilisateur
.IAProductInfo Recovered Items
.OSInstallerMessages Users
.PKInstallSandboxManager Volumes
.PKInstallSandboxManager-SystemSoftware cores
.Spotlight-V100 home
.TempReceipt.bom macOS Install Data
.TemporaryItems mnt
.Trashes opt
.file private
.fseventsd sw
-bash-3.2#

-bash-3.2# bless --info /Volumes/Mac*
4913 => Blessed System File is {Preboot}/48CA7807-E73E-4993-BB16-399FAF26D899/System/Library/CoreServices/boot.efi
4800 => Blessed System Folder is {Preboot}/48CA7807-E73E-4993-BB16-399FAF26D899/System/Library/CoreServices
The blessed volume in this APFS container is "/Volumes/Macintosh HD".
No blessed APFS snapshot for this volume.
-bash-3.2#

-bash-3.2# sw_vers -productVersion
10.15
-bash-3.2#

Merci d'avance de votre aide.
Vincent