Fixing the superblock on a HFS+ partition

Hi all!

This is the first disk recovery that I am attempting and I am learning all the terminology and tools as I go...

I have a MacBook that won't boot. I created an image of the drive using ddrescue. I can see the partitions on it when I run parted, but I cannot mount the partition. Here is what I get.

me@machine: /media/DataDrive/Macbook$ sudo losetup /dev/loop0 image -o 209735680
me@machine: /media/DataDrive/Macbook$ sudo fsck.hfsplus -f /dev/loop0
** /dev/loop0
** Checking HFS Plus volume.
Catalog file entry not found for extent
(4, 0)
** Volume check failed.

Can someone walk me through the steps in testdisk to recover from a copy of the superblock. I am assuming that will be my next step. If y'all have other suggestions on what I should try, please send them my way.

Thanks in advance for any help.


Are you sure the offset is

Are you sure the offset is correct?