Hard Disk Diagnostic Tools for Mac

Graphical interface for smartctl, part of smartmontools, enabling SMART data monitoring, drive health inspection, and diagnostic tests on hard disks.

The smartmontools package contains two utility programs (smartctl and smartd) to control and monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (SMART) built into most modern ATA and SCSI harddisks.

DriveDx is advanced drive health diagnostic and monitoring utility. Unlike most drive utilities, DriveDx does not only monitor the drive’s built-in S.M.A.R.T. status, but also analyzes the changes of all drive health indicators that are closely related to HDD or SSD failures...

Stellar Drive Monitor is an advanced drive health monitoring tool to check the real-time hard disk’s temperature, performance, and health.

SMARTReporter is an application that can warn you of some hard disk drive failures before they actually happen! It does so by periodically polling the built-in S.M.A.R.T. status of your hard disk drives as well as performing other checks for "I/O errors" or R.A.I.