en installant Archlinux sur un macbook pro sur le disque entier, je rencontre ce problème lorsque je veux installer GRUB2 (UEFI)
[benji@new-host-4 ~]$ sudo grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=arch_grub --recheck
Fatal: Couldn't open either sysfs or procfs directories for accessing EFI variables.
Try 'modprobe efivars' as root.
Fatal: Couldn't open either sysfs or procfs directories for accessing EFI variables.
Try 'modprobe efivars' as root.
Installation terminée, sans erreur.
[benji@new-host-4 ~]$