nico@MacBookPro1510:~$ sudo mount -t hfsplus /dev/sda2 -o ro,sizelimit=735827406848 /MacintoshHD/
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[ 4575.652988] hfsplus: unable to find HFS+ superblock
Ubuntu 15.10, MacBookPro Retina 2015
nico@MacBookPro 1510:~$ sudo mount -t hfsplus /dev/sda2 -o ro,sizelimit= 735827406848 /MacintoshHD/
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[ 4575.652988] hfsplus: unable to find HFS+ superblock