Disk Speed Test
Blackmagic Disk Speed Test is a macOS utility that measures storage read and write performance for video capture, editing, and playback workflows.
What is Disk Speed Test?
Blackmagic Disk Speed Test is a native Mac disk benchmarking utility for checking whether a drive is fast enough for video work. It helps editors, colorists, capture operators, and other media users measure sustained read and write performance with large test files. The app presents results in a simple visual format and shows whether a disk can support common video formats and frame rates, which makes it useful when evaluating internal SSDs, external drives, RAID arrays, and network storage. It can run repeated tests over time so users can spot performance drops during longer sessions, and it includes options such as selecting the target drive, adjusting test stress size, and saving a screenshot of the results. Blackmagic Design publishes it for macOS, and related Blackmagic video software packages also reference it as part of video storage testing workflows.
Key features
- Measure disk read and write speed with repeated performance tests
- Check whether a drive can handle common video formats and frame rates
- Test internal drives, external storage, RAID volumes, and supported network drives
- Select a target drive before running storage performance checks
- Adjust the test stress size for quicker checks or heavier testing
- Save a screenshot of benchmark results for comparison or reporting
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Safe
This is legitimate utility software from Blackmagic Design for measuring disk performance. Its normal behavior is to write and read temporary test data on the drive you choose, so you should avoid pointing tests at locations where free space is critically low or where heavy benchmark activity could interrupt active media work. The app store listing states that the developer does not collect data, which is consistent with its focused offline purpose.
Recommendation: Keep Blackmagic Disk Speed Test if you work with video capture, editing, or external storage and want a quick way to confirm disk performance. If you do not benchmark drives or no longer use Blackmagic or other video workflows, you can remove it without affecting macOS itself.
Common paths
/Applications/Blackmagic Disk Speed Test.app
Share your experience
Be the first to share your experience.