Installed Linux over Mac Files

linux logoI stupidly installed linux over the top of my mac. this wiped everything, then when I re-installed mac osx nothing was there. I did send it off to Rapid Data recovery and they were not able to recover anything from the HD. Would you be able to do anything. I did speak to a friend who works in data and they said that there still could be a way.
This is what happened.
– Linux installed which wiped HD and old Mac OSX tables.
– re-installed new mac OSX – nothing there.
– Disk image taken of HD.
So I have a disk image of the HD at that state. As I said Rapid Data already looks at it and said they could not help, I have also run recovery software with no luck.

I have a macbook air 2013 where the ssd is nonresponsive from boot. the macbook doesnt recognise the hard drive but a recovery of documents is required. also will require an eta of recovery (if possible) as i am facing an important deadline. also have an old magnetic hd (LA Lacie Porsche) in which will require recovery of files (not urgent). It’s running a version of Linux and I’m in Salford.

I found an old Seagate drive (model ST1181677LCV). As it has an ultra-wide, 80 pin SCSI connection I am unable to connect to it – and so don’t know its format – though suspect Mac.
My guess is that it may have info from the mid 1990s on it. I am not aware of there being any ‘valuable’ data on it, but would double check if it was not going to cost too much.
Are you able to read this drive? – it’s running and old version of Linux and has some Mac data on it too. It’s these files that I want to recover. I’m in Huddersfield and work in Salford.

I bought a toshiba external hard drive a while ago and stupidly converted the format from Linux PC to Mac compatible and afterwards it wouldn’t work and slowly went down hill from there. Im really scared that all the data has been erased and think theres a slim chance of getting it back. Could you give me an idea of if this is possible to repair/at least get the data from it and how much this would cost? Has 18 years worth of pictures on it!