Gfilui

I was unable to boot macOS on my mac laptop. I took the drive out to try recover my documents un my ubuntu machine. I installed

sudo apt-get install hfsprogs
sudo apt-get install hfsplus

So I could access the drive.
I then mounted the drive with read and write permissions.

sudo mount -t hfsplus -o force, rw /dev/sdb2 /media/user/MAC

It was somewhat a success as I can view and read some of my Docuemnt folders. However to access others, I would need to change the ownership and access of the folders. I tried with

 sudo chown user /media/user/MAC (my user account is 'user')

but im greeted with:

chown: changing ownership of '/media/user/MAC/Applications/Adobe Dreamweaver CS6/Adobe Dreamweaver CS6.app/Contents/Frameworks/Xalan.framework': Read-only file system
chown: changing ownership of '/media/user/MAC/Applications/Adobe Dreamweaver CS6/Adobe Dreamweaver CS6.app/Contents/Frameworks/Xerces.framework/Resources': Read-only file system
chown: changing ownership of '/media/user/MAC/Applications/Adobe Dreamweaver CS6/Adobe Dreamweaver CS6.app/Contents/Frameworks/Xerces.framework/Versions/A/_CodeSignature/CodeResources': Read-only file system

So i think to run fsck but that fails.

user@ubuntu: sudo fsck.hfsplus /dev/sdb2
** /dev/sdb2
** Checking HFS Plus volume.
** Checking Extents Overflow file.
 Invalid index key
(3, 198)
** Repairing volume.
** Rechecking volume.
** Checking HFS Plus volume.
** Checking Extents Overflow file.
 Invalid index key
(3, 198)
** Repairing volume.
** Rechecking volume.
** Checking HFS Plus volume.
** Checking Extents Overflow file.
 Invalid index key
(3, 198)
** Repairing volume.
** Rechecking volume.
** Checking HFS Plus volume.
** Checking Extents Overflow file.
 Invalid index key
(3, 198)

Anything else I could try?
I realise I will need to re-install macOS, but I just want to recover some files. Theyre there, I just cant access them due to permission.