Disk Speed Test is an easy to use tool to quickly measure and certify your disk performance for working with high quality video! Simply click the start button and Disk Speed Test will write test your disk using large blocks of data, and then display the result. Disk Speed Test will continue to test writes and reads from your disk so you can evaluate both performance and readability over time.

What’s New

Version 3.2

Improve UI to support faster disks.

Ratings and Reviews

4.7 out of 5
9 Ratings
9 Ratings
jimmy_au_vic ,

Essential App for every Mac!

Brilliant and essential app. Have been using it for many years now and it’s always brilliant to stress test your Mac Flash Drive every now and then to see if there is a speed drop over time or to see if FileVault slows it down. In my case, Read and Write speeds have increased with File Vault.

A new version is needed though for High Sierra and the new File System plus the super speed Flash Drives recently released.

Freelancer Jerachi ,

Useful tool, with immediate clear results!

A very useful tool, looking forward to something being done to improve the support of 3rd party solid states.
For those saying they it reports their drive as read only, thats because the root of the disk IS read only. if you select your home folder for the test, it works fine, and gives precisely the results you need :)

Nicwilson58 ,

Works very well but….

This app works very well and has become a standard for testing drive speed. It has an issue on the very latest macbook pro’s as the scales have not kept up with the current speed of laptops, on the new fastest 201y MacBook pro the scale maxes out at 2000, yet the speeds go way beyond that. It has another issue where it will see a writeable drive as read only, and restarting it seems to resolve the issue.


Blackmagic Design Inc
16.8 MB
OS X 10.10.0 or later, 64-bit processor
Age Rating
Rated 4+
© Blackmagic Design Inc. 2018


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