Data Recovery is an ever increasing business with more and more companies relying on its services, as technology advances, new problems arise. Companies that save documents etc to their computers always face the possibility of the computer failing and loosing their work, most companies back up their data however if the system hard drive fails, backups may not even work.
This is where the data recovery specialists come in, they can take your hard drive away and attempt to recovery the lost files. If it is too badly damages and they have special ways of taking sectors (parts) from other working hard drives, fix them to the malfunctioning hard drive along with other replaceable parts and start piecing together the lost information.
Apple Mac systems are different, the operating systems is different, the internal parts are different, the whole hardware and software structures work in different ways. Should your Mac play up and cause loss of data, normal recovery experts deal with windows based (PC's) and may not have the expertise to correct the issues with your Mac.
Mac's are becoming increasingly popular in today's market, although they still only provide a fraction of used computers they are on the up.
Apple Mac Data Recovery requires different skills, all staff that perform these repairs will be trained and skilled in the way Mac's work, essentially the same process is undergone to achieve recovery it is just done in a different way, with different parts.
You should not attempt this on your own as it takes a highly skilled professional to achieve desired results.