Et dans options de sécurité, j'ai mis "le plus sécurisé"
Peu-être cette option qui fout la zizanie ??? .....
(je n'ai pas vu cette option dans Utilitaires de disque)
Une copie d'écran serait la bienvenue....
Et dans options de sécurité, j'ai mis "le plus sécurisé"
Si tu formates ne serait-ce qu'une de tes cartes avec un PC > et qu'elle fonctionne ensuite avec ton appareil --> il serait alors intéressant de vérifier sur ton Mac quel est ce format de volume qui est reconnu valide.
Le fait d'opter pour un effacement sécurisé lors du formatage ne joue aucun rôle concernant ton problème > sinon de ralentir l'opération.
Il faudrait aussi savoir quel est le format des fichiers que tu copies dans le volume de la carte.
diskutil list/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            999.3 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *1.0 GB     disk1
   1:             Windows_FAT_32 NO NAME                 1.0 GB     disk1s1diskutil info disk1s1 Device Identifier:        disk1s1
   Device Node:              /dev/disk1s1
   Whole:                    No
   Part of Whole:            disk1
   Volume Name:              NO NAME
   Mounted:                  Yes
   Mount Point:              /Volumes/NO NAME
   Partition Type:           Windows_FAT_32
   File System Personality:  MS-DOS FAT32
   Type (Bundle):            msdos
   Name (User Visible):      MS-DOS (FAT32)
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 Secure Digital
   SMART Status:             Not Supported
   Volume UUID:              BC6AFE75-CDAA-302C-BA81-594520005BBE
   Disk Size:                1.0 GB (1015549440 Bytes) (exactly 1983495 512-Byte-Units)
   Device Block Size:        512 Bytes
   Volume Total Space:       1.0 GB (1011351552 Bytes) (exactly 1975296 512-Byte-Units)
   Volume Used Space:        101.7 MB (101699584 Bytes) (exactly 198632 512-Byte-Units) (10.1%)
   Volume Available Space:   909.7 MB (909651968 Bytes) (exactly 1776664 512-Byte-Units) (89.9%)
   Allocation Block Size:    4096 Bytes
   Read-Only Media:          No
   Read-Only Volume:         No
   Device Location:          Internal
   Removable Media:          Removable
   Media Removal:            Software-Activated/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *1.0 GB     disk1
   1:             Windows_FAT_32 NO NAME                 1.0 GB     disk1s1/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *8.1 GB     disk1
   1:                 DOS_FAT_32 --                      8.1 GB     disk1s1diskutil info disk1s1   Device Identifier:        disk1s1
   Device Node:              /dev/disk1s1
   Whole:                    No
   Part of Whole:            disk1
   Volume Name:              --
   Mounted:                  Yes
   Mount Point:              /Volumes/--
   Partition Type:           DOS_FAT_32
   File System Personality:  MS-DOS FAT32
   Type (Bundle):            msdos
   Name (User Visible):      MS-DOS (FAT32)
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 Secure Digital
   SMART Status:             Not Supported
   Volume UUID:              AEA21400-014F-3B26-B908-DA7CBF6CA9E5
   Disk Size:                8.1 GB (8068792320 Bytes) (exactly 15759360 512-Byte-Units)
   Device Block Size:        512 Bytes
   Volume Total Space:       8.1 GB (8066793472 Bytes) (exactly 15755456 512-Byte-Units)
   Volume Used Space:        14.4 MB (14417920 Bytes) (exactly 28160 512-Byte-Units) (0.2%)
   Volume Available Space:   8.1 GB (8052375552 Bytes) (exactly 15727296 512-Byte-Units) (99.8%)
   Allocation Block Size:    32768 Bytes
   Read-Only Media:          No
   Read-Only Volume:         No
   Device Location:          Internal
   Removable Media:          Removable
   Media Removal:            Software-Activated   Partition Type:           Windows_FAT_32
   File System Personality:  MS-DOS FAT32
   Type (Bundle):            msdos
   Name (User Visible):      MS-DOS (FAT32)   Partition Type:           DOS_FAT_32
   File System Personality:  MS-DOS FAT32
   Type (Bundle):            msdos
   Name (User Visible):      MS-DOS (FAT32)diskutil partitionDisk disk1 mbr fat32 ritournel 100%ritournel does not appear to be a valid volume name for its file systemdiskutil partitionDisk disk1 mbr fat32 CARTE 100%/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            999.3 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *8.1 GB     disk1
   1:                 DOS_FAT_32 CARTE                   8.1 GB     disk1s1 
	