SMARTReporter for Mac

SMARTReporter for Mac is an application that can warn you of some hard disk drive failures before they actually happen! It does so by periodically polling the S.M.A.R.T. status of your hard disk drives. S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) is a technology built into most modern hard disk drives that acts as an "early warning system" for pending hard disk drive problems. The tool can notify you of impending hard disk drive failures by a variety of notification options including alert boxes, on-screen notifications and email. The current status of your hard disk drives is also always easily recognizable because SMARTReporter for macOS changes its icon (optionally in the menubar) from green to red if a problem occurs. SMARTReporter does not only check for S.M.A.R.T. disk failure predictions but increases failure prediction accuracy by checking for dangerous I/O errors as well. Additionally the app can monitor the status of software R.A.I.D. sets for degradation or check free space on the boot disk.

Please note that a S.M.A.R.T. alert does not mean that your disk will certainly fail completely, nor can S.M.A.R.T. (or I/O-error checking) catch all possible disk problems before they happen - it's just a very valuable indicator. The app is NOT a substitute for regular backups especially as it only concerns itself with hardware-level problems (like physical drive failures) and not at all with software-level problems (like filesystem health) that could also destroy all your data. Perform regular backups, make sure you read the F.A.Q. entry about prediction reliability and follow these links for more information about S.M.A.R.T. technology in general.

Limitations:
Only 'internal' disks are supported, but some external disks can be made to work with additional software. Some disks do not support S.M.A.R.T. at all and therefore do not work with SMART Reporter's S.M.A.R.T.-check:

• the SSD built into the Early 2015 and Early 2016 MacBook 12"
• the SSD built into the Late 2016 MacBook Pro (TouchBar)
• the "OWC Aura SSD for Mac Pro"