TechTool Pro - Techtool Pro is a robust hardware diagnostic tool available for Macintosh.
CrystalDiskInfo - CrystalDiskInfo. A HDD/SSD utility software which supports a part of USB connection and Intel RAID. >> Download. Intel RAID (IRST). IRST 11.
DiskWarrior - DiskWarrior, the world's most advanced and highest rated hard disk, hard drive, and disk repair and data recovery tool for macOS, OS X and Mac OS X.
Hard Disk Sentinel - Monitoring hard disk health and temperature. Test and repair HDD problems and predict failures.
Disk Drill by Cleverfiles - Recover any type of deleted files in Windows & Mac including Office documents, messages, and media files quickly and easily.
MHDD - MHDD is the most popular freeware program for low-level HDD diagnostics.