In Macintosh OS X a built-in tool- Disk Utility allows you to perform the formatting process by clicking on "Erase" tab after specifying the disk/volume, its format and name. Formatting can fix some of the hard drive related logical problems, but also erase all the saved files and folders in the Macintosh HD, so usually you may not format Macintosh HD. Formatting is only performed for your certain purpose, such as:
When you format a Macintosh HD, actually the files are not erased (until they are overwritten by other files). The file system of disk is replaced with a new empty file system, thus, the entries of all the files and directories stored on the disk are erased and they become inaccessible. But hard drive maintains an index file, which tells the operating system where a particular file is stored. When you format the hard drive, links between index and file are deleted. The file remains physically intact. You can recover files after format as long as the original files are not overwritten by others.
Since it is possible to recover files after format, how to do has really confused some Mac users. In brief, there are two ways: Restore and Recover.
If you have backed up your Mac files, you can easily restore formatted files from your backup. If there is no valid backup, you need format recovery software - uFlysoft Data Recovery for Mac, to recover files from formatted hard drive.
Follow the three steps below to complete format data recovery
Step1. Install and run uFlysoft Data Recovery on your Mac
Install uFlysoft Data Recovery to the different partition from where you lost data. This operation is to avoid overwriting original data.
Step2. Select the Macintosh HD for recovery format
Select the Macintosh HD that you formatted accidentally, and click on "Scan" to find out all lost files.
Step3. Start to recover formatted files from Mac
When the scanning completes, you can preview the scanning results and check those files important to you for recovery.