Use Data Rescue to recover:

• crashed, corrupted or non-mounting hard drive
  
• deleted, damaged, or lost files
  
• reformatted or erased hard drive
  

One powerful new feature found in Data Rescue 4 is BootWell. Your Mac's main hard drive (sometimes referred to as the Main HD or Boot Drive) is where all of your computer files are stored. When there is a problem with this hard drive it can be very difficult, frustrating and time-consuming to get those files back. BootWell is an all-new feature that makes recovery of your main hard drive painless, fast, and easy.

• Works on all Mac hard drives even if they fail to mount or only partially operate
  
• Recovers digital pictures from your camera media even after it has been erased or reformatted
  
• Recover your entire Mac hard drive or just the files you need.
  
• Recovers all file types from any HFS/HFS+ formatted hard drive
  
• Tuned for all modern OS X versions 10.7.5 and later
  
• Recovers from any iMac, Macbook, Macbook Pro, MacBook Air, Mac mini, MacPro, including Retina displays
  
• RAW data recovery is enabled from the entire Mac hard drive
  
• Supports Data recovery from NTFS-based Boot Camp Partitions
  

Version 4.3.1:

• Increase maximum file size
  
• Bug fixes