Alsoft DiskWarrior 4.2 is a data recovery tool. Sometimes accidents can happen and your hard drive may become corrupted or damaged. This can cause problems as you may have important data stored on that drive that you do not want to lose. This is where a recovery utility like DiskWarrior comes in. DiskWarrior retrieves as much of your data from the damaged hard drive as it can, often being able to reconstruct the majority of the at-risk data. It is designed to work as automatically as possible - just tell it which drive to target and let it to the work.
Please note that DiskWarrior 4.2 is not compatible with Macs that are powered by Intel Core i3, i5 or i7 processors.