While using Mac system blue screen on start up Mac may appears on screen. It is a common error issue which is caused by corruption in time machine. It is a very critical issue which limits the users from backing up data using time machine any more. There are several reasons which can cause corruption in time machine such as virus infection, very large backup files, file system error and many others. However you doesn't need to worry as you can fix this very blue screen on start up Mac error. In order to fix this error issue you will need to format your hard drive. As we all know formatting is used to wipe the entire hard drive throughly thus it can easily resolve this catastrophic backup issue on your Mac. Well, at the meantime time it will also erase all your hard drive files completely on your Mac. But once blue screen on start up Mac is resolved on Mac then you can easily recover all your lost Mac files using Mac Data Recovery Software. It is very effective, easy to use and reliable tool which safely recovers all lost Mac data in just few easy steps. It allows the users to recover files selectively and then restore them on users selected location. Therefore it is recommended to use Mac Data Recovery Software to recover files after blue screen on start up Mac.