Je m'y attendais...
Passe encore la commande :
Bloc de code:diskutil verifyDisk disk2
- qui vérifie la table GPT du disque
Poste l'affichage retourné.
Bloc de code:
Started partition map verification on disk2
Checking prerequisites
Checking the partition list
Checking the partition map size
Checking for an EFI system partition
Checking the EFI system partition's size
Checking the EFI system partition's file system
Checking the EFI system partition's folder content
Checking all HFS data partition loader spaces
Volume on disk2s4 has 0 bytes of trailing loader space and it needs 134 217 728 bytes
Problems were found with the partition map which might prevent booting
Error: -69765: Partition map needs repair because a data partition needs loader space