If a volume has been reformatted.
If a volume is blocked from access after repartitioning.
When files and folders are accidentally deleted.
When the Apple partition map is destroyed.
If the Apple catalog file gets corrupted.
Should a drive be inadvertently initialized.
When Apple disk verify and repair fails in it effort.
Or should any other application damage occur that disallows startup.

In any of these scenarios the REMO Mac Data Recovery Software will recover the needed Mac files so that the computer may be successfully reloaded.