DriveDx vs GSmartControl

DriveDx monitors and diagnoses SSD and HDD health on macOS, with the aim of helping users identify drive trouble before data loss or downtime. It evaluates indicators such as SSD wear and write endurance, I/O errors, pending sectors, and reallocated bad sectors. Its reports distinguish Warning, Failing (Pre-fail), and Failed states. The app can run in the background, check drives periodically, and alert users when it detects an issue. Users can initiate and control self-tests of electrical or mechanical performance and read performance. DriveDx calculates health and performance ratings, plus an indicator of remaining SSD lifetime. It can email problem alerts and drive status reports, with reporting configurable by criteria, and can alert users when free space crosses a chosen threshold. The product page lists compatibility from macOS 10.9 through macOS 26 and invites users to try it free, without specifying a trial length. There is no free plan. The personal license costs $19.99 as a one-time purchase for up to three personal computers and non-commercial use; other licenses cover household or commercial computer counts.

GSmartControl is a graphical interface for smartctl, used to inspect drive SMART data and run tests. It displays drive identity, capabilities, attributes and device statistics, and automatically highlights anomalies. Users can enable or disable SMART and adjust global or per-drive smartctl options. Saved smartctl output can be opened as a read-only virtual device. The software supports ATA drives, including SATA and PATA, and NVMe drives, plus some devices behind USB bridges and selected RAID controllers. SCSI and SAS drives are not supported, though some information about them may appear. GSmartControl is free software under the GNU General Public License version 3. Downloads include Linux packages, Windows installers and portable archives, FreeBSD ports, macOS packages and source code. smartmontools is a runtime requirement, but official Windows packages include the required software. Useful operations require root or Administrator privileges because operating systems restrict direct hardware access. Supported systems listed include Linux, Windows, FreeBSD, NetBSD, OpenBSD, DragonFlyBSD, macOS and Solaris; QNX support is described as untested.