AmorphousDiskMark
AmorphousDiskMark is a macOS storage benchmark utility that measures disk read and write performance in MB/s and IOPS.
What is AmorphousDiskMark?
AmorphousDiskMark is a native macOS utility for testing storage performance on internal drives, external SSDs, USB drives, and other volumes. It helps users measure sequential and random read and write speeds so they can compare disks, check enclosure performance, or verify how a drive behaves under different workloads. The app presents results in MB/s and IOPS, which makes it useful for both quick checks and more detailed benchmark comparisons. Users can adjust test size, queue depth, interval, and duration to run lighter or more demanding measurements. It is commonly used by Mac users evaluating external storage, troubleshooting unusually slow disk performance, or comparing upgrades and connection types such as USB and Thunderbolt. AmorphousDiskMark is published by Katsura Shareware and fits best as a focused system utility.
Key features
- Measure sequential read and write performance for storage devices
- Test random 4 KiB read and write performance
- View benchmark results in MB/s and IOPS
- Adjust queue depth, test size, interval, and duration
- Benchmark internal drives and external volumes
- Copy benchmark results as plain text for sharing or comparison
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
AmorphousDiskMark is a legitimate disk benchmarking tool for macOS. Its main activity is creating and reading test data on the selected storage device, which is normal for measuring performance. Repeated benchmark runs can add unnecessary write wear to SSDs and flash storage, so it is best to use it for occasional testing rather than constant background monitoring. Keep the app closed when you are not benchmarking, and avoid running long or repeated tests unless you specifically need them.
Recommendation: Keep AmorphousDiskMark if you use it to test drive speed, compare storage devices, or troubleshoot slow disk performance. If you do not benchmark storage on your Mac, you can remove it without affecting normal macOS use.
Common paths
/Applications/AmorphousDiskMark.app
Container paths
~/Library/Containers/com.katsurashareware.AmorphousDiskMark
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