diglloydTools DiskTester review
A deep macOS benchmark suite for storage diagnostics, testing, and review work.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
diglloydTools DiskTester is macOS software for evaluating hard drives, SSDs, volumes, and RAID systems. It is aimed at Mac users who need more than basic sequential speed checks, including storage testers, RAID and SATA hardware manufacturers, and performance reviewers. The product combines a graphical interface with command-line tools, making it suitable for both guided testing and repeatable technical workflows.
Its main strength is the breadth of its testing scope. DiskTester covers sequential read and write speeds, configurable random I/O transfer sizes, command-line IOPS measurement, and multiple simultaneous data streams. It also supports volume-filling and across-volume performance tests, SSD reconditioning, reliability checks, and data-integrity testing. File-reading and volume-information commands extend its use beyond benchmark charts, while graphing spreadsheets are available for selected test results. This makes it a strong fit for investigating storage behavior, comparing configurations, and identifying possible hardware or driver problems.
The product is desktop software for macOS, with email and documentation listed as support channels. Its license works in perpetuity after installation. The classic diglloydTools software is marked deprecated and documented as running through macOS Ventura, so buyers should consider their macOS version and longer-term maintenance needs before choosing it. DiskTester suits technically advanced Mac users who value detailed storage diagnostics and command-line access. Users seeking a current cross-platform tool, a free plan, or a simpler speed-only benchmark should look elsewhere.
diglloydTools DiskTester pros and cons
- Where it wins
- Covers sequential, random I/O, IOPS, and simultaneous-stream tests
- Adds volume-filling, SSD reconditioning, reliability, and integrity testing
- Offers both graphical and command-line interfaces for technical workflows
- Where it doesn't
- Runs on macOS only
- The classic software is marked deprecated and documented through macOS Ventura
- Refund requests are limited to 3 calendar days, with no refund after download
diglloydTools DiskTester fact sheet, pricing and score →
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