Tu vas taper la commande :
hdiutil create toto -size 120g
tu vas attendre que la création soit terminée
puis tu vas faire
rm toto.dmg
puis refaire un
df -H
Tout ceci pour "forcer" le système à libérer de la place.
Last login: Thu Mar  2 19:03:21 on ttys000
MBP-de-Jonathan:~ Jonathan$ hdiutil create toto -size 120g
hdiutil: create failed - Plus d’espace libre sur le périphérique
MBP-de-Jonathan:~ Jonathan$ rm toto.dmg
rm: toto.dmg: No such file or directory
MBP-de-Jonathan:~ Jonathan$ df -H
Filesystem      Size   Used  Avail Capacity iused      ifree %iused  Mounted on
/dev/disk2s2    250G   165G    85G    66%  734456 4294232823    0%   /
devfs           185k   185k     0B   100%     627          0  100%   /dev
map -hosts        0B     0B     0B   100%       0          0  100%   /net
map auto_home     0B     0B     0B   100%       0          0  100%   /home
/dev/disk1s1     64G    57G   7.1G    89%  435345      53863   89%   /Volumes/SSD
MBP-de-Jonathan:~ Jonathan$
	En même temps, tu peux remarquer que le contenu de Système ne fait que 5,8 Go et pas 132Je regarde.
J'ai posté la mauvaise capture.
Voici le résultat pour OmniDiskSweeper
Voir la pièce jointe 113506
Tu disposes de quelle taille mémoire?
Que renvoie :
du -sh /
MBP-de-Jonathan:~ Jonathan$ du -sh /
du: /.DocumentRevisions-V100: Permission denied
du: /.fseventsd: Permission denied
du: /.Spotlight-V100: Permission denied
du: /.Trashes: Permission denied
du: /Applications/DNG ProfileManager.app/Contents/_CodeSignature: Permission denied
du: /Library/Application Support/Apple/ParentalControls/Users: Permission denied
du: /Library/Application Support/ApplePushService: Permission denied
du: /Library/Application Support/com.apple.TCC: Permission denied
du: /Library/Caches/com.apple.iconservices.store: Permission denied
du: /Library/SystemMigration/History/Migration-3E5E1C19-EC69-49B1-BAEF-33144D8677B1/QuarantineRoot/System/Library/DirectoryServices/DefaultLocalDB/Default: Permission denied
du: /private/etc/cups/certs: Permission denied
du: /private/var/agentx: Permission denied
du: /private/var/at/tabs: Permission denied
du: /private/var/at/tmp: Permission denied
du: /private/var/audit: Permission denied
du: /private/var/backups: Permission denied
du: /private/var/db/applepay: Permission denied
du: /private/var/db/caches/opendirectory: Permission denied
du: /private/var/db/ConfigurationProfiles/Setup: Permission denied
du: /private/var/db/ConfigurationProfiles/Store: Permission denied
du: /private/var/db/datadetectors: Permission denied
du: /private/var/db/dhcpclient: Permission denied
du: /private/var/db/diagnostics: Permission denied
du: /private/var/db/dslocal/nodes/Default: Permission denied
du: /private/var/db/geod: Permission denied
du: /private/var/db/locationd: Permission denied
du: /private/var/db/lockdown: Permission denied
du: /private/var/db/nsurlsessiond: Permission denied
du: /private/var/db/securityagent: Permission denied
du: /private/var/db/Spotlight: Permission denied
du: /private/var/db/sudo: Permission denied
du: /private/var/db/TokenCache: Permission denied
du: /private/var/folders/6b/bm0ttgc56z15p_v4p_q11fvm0000gn/C: Permission denied
du: /private/var/folders/6b/bm0ttgc56z15p_v4p_q11fvm0000gn/T: Permission denied
du: /private/var/folders/sl/n7hvs83d1pn2zlpbhdp9djd40000gn/C: Permission denied
du: /private/var/folders/sl/n7hvs83d1pn2zlpbhdp9djd40000gn/T: Permission denied
du: /private/var/folders/v8/9k5d1rh51vb7_flzsrvpfr0w0000gn/0/com.apple.dock.launchpad: Permission denied
du: /private/var/folders/v8/9k5d1rh51vb7_flzsrvpfr0w0000gn/0/com.apple.notificationcenter: Permission denied
du: /private/var/folders/v8/9k5d1rh51vb7_flzsrvpfr0w0000gn/0/com.apple.pluginkit: Permission denied
du: /private/var/folders/v8/9k5d1rh51vb7_flzsrvpfr0w0000gn/C: Permission denied
du: /private/var/folders/v8/9k5d1rh51vb7_flzsrvpfr0w0000gn/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/0/com.apple.pluginkit: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/0/com.apple.revisiond/com.apple.revisiond.temp: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/0/com.apple.revisiond.temp: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/0/com.apple.Spotlight: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000000h000004/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000000h000004/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000003000000r/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000003800000t/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000003800000t/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000006r00001p/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000006w00001q/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000006w00001q/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000084000021/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000084000021/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000b400002s/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000b400002s/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000bh00002w/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000bh00002w/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000c4000031/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000c4000031/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000s0000068/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000s0000068/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000s4000069/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000s800006_/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000s800006_/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000sc00006b/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000sc00006b/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000sm00006d/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000sm00006d/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000t800006k/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000th00006m/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000th00006m/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000tm00006n/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000vr00006y/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000vr00006y/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000xc00007b/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000xc00007b/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y000007h/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y000007h/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y400007j/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y800007k/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000y800007k/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000yc00007l/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000z000007r/0/com.apple.notificationcenter: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000z000007r/0/com.apple.pluginkit: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000z000007r/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000z000007r/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000104000081/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000104000081/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000108000082/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n0000108000082/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000010c000083/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000010c000083/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000010h000084/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000010h000084/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000010m000085/C: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_n000010m000085/T: Permission denied
du: /private/var/folders/zz/zyxvpxvq6csfxvn_ngzzzzzvzzzzzy/T: Permission denied
du: /private/var/jabberd: Permission denied
du: /private/var/lib/postfix: Permission denied
du: /private/var/log/com.apple.revisiond: Permission denied
du: /private/var/ma: Permission denied
du: /private/var/root: Permission denied
du: /private/var/run/mds: Permission denied
du: /private/var/spool/cups: Permission denied
du: /private/var/spool/mqueue: Permission denied
du: /private/var/spool/postfix/active: Permission denied
du: /private/var/spool/postfix/bounce: Permission denied
du: /private/var/spool/postfix/corrupt: Permission denied
du: /private/var/spool/postfix/defer: Permission denied
du: /private/var/spool/postfix/deferred: Permission denied
du: /private/var/spool/postfix/flush: Permission denied
du: /private/var/spool/postfix/hold: Permission denied
du: /private/var/spool/postfix/incoming: Permission denied
du: /private/var/spool/postfix/maildrop: Permission denied
du: /private/var/spool/postfix/private: Permission denied
du: /private/var/spool/postfix/public: Permission denied
du: /private/var/spool/postfix/saved: Permission denied
du: /private/var/spool/postfix/trace: Permission denied
du: /System/Library/Caches/com.apple.coresymbolicationd: Permission denied
du: /System/Library/Caches/com.apple.receiptInstaller: Permission denied
du: /System/Library/DirectoryServices/DefaultLocalDB/Default: Permission denied
du: /System/Library/User Template: Permission denied
du: /Users/bienvenue/Applications: Permission denied
du: /Users/bienvenue/Desktop: Permission denied
du: /Users/bienvenue/Documents: Permission denied
du: /Users/bienvenue/Downloads: Permission denied
du: /Users/bienvenue/Library: Permission denied
du: /Users/bienvenue/Movies: Permission denied
du: /Users/bienvenue/Music: Permission denied
du: /Users/bienvenue/Pictures: Permission denied
du: /Users/bienvenue/Public/Drop Box: Permission denied
du: /Users/Guest/Desktop: Permission denied
du: /Users/Guest/Documents: Permission denied
du: /Users/Guest/Downloads: Permission denied
du: /Users/Guest/Library: Permission denied
du: /Users/Guest/Movies: Permission denied
du: /Users/Guest/Music: Permission denied
du: /Users/Guest/Pictures: Permission denied
du: /Users/Guest/Public/Drop Box: Permission denied
du: /Users/Jonathan/Library/Saved Application State/com.yourcompany.MiniTool_Mac_Data_Recovery_v2.3.savedState: Permission denied
du: /Users/Jonathan/Library/Saved Application State/com.yourcompany.StellarPhoenixMacDataRecovery.savedState: Permission denied
du: /usr/sbin/authserver: Permission denied
108G    /
	Tu disposes de quelle taille mémoire?
Que renvoie :
ls -la /
MBP-de-Jonathan:~ Jonathan$ ls -la /
total 85
drwxr-xr-x  34 root  wheel   1224  2 mar 18:07 .
drwxr-xr-x  34 root  wheel   1224  2 mar 18:07 ..
-rw-rw-r--   1 root  admin  10244  2 mar 19:01 .DS_Store
d--x--x--x   9 root  wheel    306  2 mar 18:28 .DocumentRevisions-V100
drwxr-xr-x   2 root  wheel     68 17 oct  2014 .PKInstallSandboxManager
drwxr-xr-x@  2 root  wheel     68  2 mar 22:18 .PKInstallSandboxManager-SystemSoftware
-rw-rw-r--   1 root  admin    183 29 jan  2012 .PR007377
drwx------   5 root  wheel    170 17 oct  2014 .Spotlight-V100
d-wx-wx-wt   2 root  wheel     68  2 jan  2015 .Trashes
----------   1 root  admin      0 29 sep 01:16 .file
drwx------  12 root  wheel    408  2 mar 18:32 .fseventsd
drwxr-xr-x@  2 root  wheel     68 12 oct 08:20 .vol
drwxrwxr-x+ 94 root  admin   3196  2 mar 17:37 Applications
lrwxr-xr-x   1 root  wheel     49  2 jan  2015 Informations sur l’utilisateur -> /Library/Documentation/User Information.localized
drwxr-xr-x+ 62 root  wheel   2108 14 déc 23:09 Library
drwxr-xr-x@  2 root  wheel     68 12 oct 08:20 Network
drwxr-xr-x@  4 root  wheel    136 27 jan 17:46 System
drwxr-xr-x   7 root  admin    238 12 oct 08:20 Users
drwxr-xr-x@  4 root  wheel    136  2 mar 18:32 Volumes
drwxr-xr-x@ 38 root  wheel   1292 27 jan 17:46 bin
drwxrwxr-t@  2 root  admin     68 12 oct 08:20 cores
dr-xr-xr-x   3 root  wheel   4209  2 mar 18:28 dev
lrwxr-xr-x@  1 root  wheel     11 12 oct 08:19 etc -> private/etc
dr-xr-xr-x   2 root  wheel      1  2 mar 18:34 home
-rw-r--r--@  1 root  wheel    313 31 jul  2016 installer.failurerequests
dr-xr-xr-x   2 root  wheel      1  2 mar 18:34 net
drwxr-xr-x@  3 root  wheel    102 12 oct  2015 opt
drwxr-xr-x@  6 root  wheel    204 12 oct 08:20 private
drwxr-xr-x@ 63 root  wheel   2142 27 jan 17:45 sbin
lrwxr-xr-x@  1 root  wheel     11 12 oct 08:19 tmp -> private/tmp
drwxr-xr-x@ 10 root  wheel    340 14 déc 23:11 usr
lrwxr-xr-x@  1 root  wheel     11 12 oct 08:19 var -> private/var
MBP-de-Jonathan:~ Jonathan$
	Donne les retours de :
sudo du -sh /
MBP-de-Jonathan:~ Jonathan$ sudo du -sh /
Password:
201G    /
MBP-de-Jonathan:~ Jonathan$
	Donne les retours de :
sudo du -sh /.*
MBP-de-Jonathan:~ Jonathan$ sudo du -sh /.*
201G    /.
201G    /..
12K    /.DS_Store
92G    /.DocumentRevisions-V100
  0B    /.PKInstallSandboxManager
  0B    /.PKInstallSandboxManager-SystemSoftware
4,0K    /.PR007377
473M    /.Spotlight-V100
  0B    /.Trashes
  0B    /.file
1,4M    /.fseventsd
  0B    /.vol
MBP-de-Jonathan:~ Jonathan$
	Tu peux supprimer ce répertoire : /.DocumentRevisions-V100
Qui contient les versions modifiées de certains documents :
sudo rm -rf /.DocumentRevisions-V100

Donc tu laisses ainsi et tu surveilles régulièrement ce répertoire :
sudo du -sh /.DocumentRevisions-V100