Mount an Apple APFS drive in Ubuntu
sudo apt install libfsapfs-utils
List your drives:
sudo fdisk -l
Look for the drive you want to mount. Example:
Device Start End Sectors Size Type
/dev/sdb1 40 409639 409600 200M EFI System
/dev/sdb2 409640 2000409223 1999999584 953.7G unknown
/dev/sdb2 is the drive we want to mount
Issue the command to mount the drive:
sudo fsapfsmount -f 1 [source] [directory to mount at] sudo fsapfsmount -f 1 /dev/sdb2 /media/usb
The drive contents will be inaccessible to all but the root user.
If you want to launch the Ubuntu File Manager as root:
sudo xdg-open .