Disk Drill is an invaluable do-it-yourself data recovery OS X tool.

Disk Utility is a system utility for performing disk and disk volume-related tasks on the macOS.

DriveDx is an advanced drive health (S.M.A.R.T.) diagnostics and monitoring utility.

GSmartControl is a graphical user interface for smartctl (from smartmontools package), which is a tool for querying and controlling SMART.

Smartmontools (S.M.A.R.T. Monitoring Tools) is a set of utility programs (smartctl and smartd) to control and monitor computer storage systems using the Self-…