Is your mac OS x failed to boot? Are you searching for the proper knowledge about this issue in your Mac system? If yes then you don't have to worry anymore as you have come to the exact place where you will get complete assist about it. Let me inform you that worldwide the many users of Mac computers are facing this same issue of mac OS x failed to boot. Basically there are some factors which is causing this issue. If the hard drive of the system will be crashed and due to corruption of system files this issue will occurs. There are some other reasons also that are responsible for this mac OS x failed to boot issue. The main problem is that this issue can causes the loss of stored data in the Mac system. The user who have already created the backup file in another external hard drive are safe. But the users who haven't created backup file got concerned about the data recovery. Here i am introducing you a good featured third party tool which is called as Mac data recovery software that can easily recover the data easily.