Voila, à priori il y'a bien une erreur :
Last login: Fri Dec 29 23:11:33 on console
imac-de-thibault:~ thibault$ diskutil ap resizeContainer disk1 400g jhfs+ BROL 0b
Started APFS operation
Resizing APFS Container designated by APFS Container Reference disk1
Verifying storage system
Using live...