Mac users has faced the problems regarding to the data file corruption and deletion. These situations are very critical as if you don't know the right way then it will be your biggest mistakes and you will loose all your precious data. Unfortunately, Macintosh operating system does not have software that can provide the recovery of those files that are corrupted, deleted or lost due to any of these following reasons:

• Virus Attacks
• Improper System Shutdown
• Malfunctioning of operating system and application
• Bad Sector in the disk
• Partition Table Corruption
• Disk Initialization
• Master Volume Block or Volume Header Corruption
• Mac Catalog File Corruption
• Extents or Extents overflow file corruption
• Catalog File's Node Corruption

If you go in the technical side then you will see that there are Local File System that includes HFS (Hierarchical file System), HFS+ (Hierarchical File System+). If any kind of loss occurs on these file systems then it directly affects on the files that are stored on your computer system. Mac operating system uses Catalog Files. In the Mac Operating System the File Manager uses a file that is known as catalog file. This file maintains information about the hierarchy of files and directories on a volume. If the corruption occurs in these file then it is very challenging to access all your files again. If it happened with you then you might not able to access all the files and directories that you have created on your operating system.

To Know More about Catalog Files you can visit on
http://developer.apple.com/documentation/mac/files/File-105.html

Now you need 3rd Party software that is compatible with your Mac Operating System. One of them that is very popular in between Mac users is known as Mac Data Recovery Software. It's a perfect software that recovers the data from the HFS, HFS+ UFS file systems from almost every kind of hard disks like IDE, SCSI, Firewire, RAID Arrays and Multi Disk Data Servers, Tape Cartridges and Tape Libraries, Removable Disks and storage media. It can easily perform the Mac Catalog File Corruption Recovery . If your computer is not booting then you can install it on the windows operating system based computer and by connecting the disk on Mac Computer you can perform the recovery.