All the MAC systems have disk utility tool for keeping a check of data consistency as well as affecting repair in respect of damage caused to the structure of the directory besides the disk partitions as well as mac file recovery.

Most of the commonly occurring errors encountered by MAC system can be rectified by deploying the Disk Recovery tool, which is basically a tool checking and affecting repair required in respect of any corruption noticed.

It is its good feature is made use of in restoration of MAC disk image, in case it becomes otherwise inaccessible. The following procedure is adopted:

Get connected to external location of hard drive, which is having the backup.
Make selection of the application at Utilities by clicking at Disk Utility, the result is opening of the disk utility tool.
Do the insertion of CD or DVD in the system.
One can locate disk image file in the disk utility bar, in case it is not there just drag it into it.
At the location of Disk Utilitys side bar do the high lighting of CD or DVD; thereafter do the selection of Restore partition.
In case it is required for restoration of disk image to a disk at external location, the action required is of dragging the MAC image file along with media to the destination field and click Restore button followed by OK to verify it, for the process to continue.

Thus the problem of data loss can be solved.