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 3.3

Add support for M1 powered Macs.

Ratings and Reviews

3.7 out of 5
33 Ratings

33 Ratings

Slow Internet user ,

Excellent app, but could be better for power users

It is fast, easy and clean, and there are terminal commands to use, but I would like to see a terminal option added to select target disk. Otherwise, decent

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.

23641242138 ,

OK but confusing

Big plus is it is free, this is a great tool thank you.

Confusing at first because it seems to keep going, is not immediately apparent that you can stop it any time.

App Privacy

The developer, Blackmagic Design Inc, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.