Recovery of data from a failed PC running a Windows operating system is a fairly straightforward affair. You purchase a good third party scanning program and then use it to search for files bearing common extensions in the areas that have been remarked by your computer as free space. This relabeling of space occurs when you either delete a file or have a file become corrupted. File deletion usual is the result of human error will file damage happens during transfer of data or computer start up or and shut down. Still there are a dozen programs for Windows data recovery that are effective.
Mac data recovery is an entirely separate issue. As Mac computers use a three tiered file storage system the process of “digging in” to the hard disk for Mac file recovery is far more complicated. Before a program can scan for and find lost Mac files it must get past the Mac operating system disk verification. Mac recovery software must be able to run a diagnostic check of the drive and when a disk verification error is noted clear that error before receiving access to the inner files.