If your Mac computer is not booting up then it may be because of the corruption of the operating system that is not allowing the computer to start. You may get different types of screens as a result of it like the blue screen, grey screen, black screen and even the spinning beachball. So now the question arises how to fix Mac OS corruption and get back all the data that is lost due to corruption or while fixing it. The corruption however can take place when the system has been abruptly closed, the file system of drive has gone damaged. You will have to use the disk utility to repair the damage of the drive or else you will have to format it. Then after you will have to reinstall the operating system which is also done in case of OS X file corruption. This was the answer for how to fix Mac OS corruption but what about data recovery. The data can be recovered by using the time machine backup utility which which works to save an external copy of the preferred in the time capsule. If you can not get the files you require then you can use the mac data recovery software which is the able to scan the Mac drive and display the lost files in the preview. The selected files are restored in an easy and effective way. So you should download the software when how to fix Mac OS corruption issue is resolved.