Although Mac OS X is an advanced and well developed but there are chances of corruption and you may require Mac data recovery after OS corruption. When the Mac OS X gets corrupted you generally get the grey screen or the kernel panic. The Mac system can not get access to the Operating System file and it will not boot. There are various reasons for Mac data recovery after OS Corruption such as Hard drive failure, system file corruption or dislocation, virus attack, improper shut down, power surge while system is operational etc. When the OS has corrupted then there is no other option than reinstall the OS and also you have to perform Mac data recovery after OS corruption to restore deleted data. Data recovery can be done using Time Machine if you have set it up earlier or else you have to use a recovery tool. But before using a recovery tool make sure that you don't use the system hard disk for any copying or downloading purposes as it will overwrite the deleted data. The best available tool to you is Mac data recovery software. It supports restoration of all type of files for Mac data recovery after OS corruption.