Método rápido (tenha certeza sobre o UUID):
$ sudo gedit /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda4 during installation
UUID={} / ext4 defaults,subvol=@ 0 1
# /boot/efi was on /dev/sda1 during installation
UUID={} /boot/efi vfat umask=0077 0 1
# /home was on /dev/sda4 during installation
UUID=3dfc046ght43-2e3-40bc-81c8-23e84e820450 /home ext4 defaults,subvol=@home 0 2
UUID=2ed003df-e139-48a6-b15a-25378925789 none none uid=0,owner,noauto 0 0
#This last line has been added by you. Just subst it with you Macintosh HD partition UUID.