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To download Blackmagic Disk Speed Test from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.

Blackmagic Disk Speed Test

By Blackmagic Design Inc

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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 in Version 2.2.2

Improved compatibility with Mac OS X 10.10 Yosemite.


Screenshot 1

Customer Reviews

amateurish and buggy

I just downloaded BlackMagic Disk Speed Test to check the disk speeds of my Mac Pro 3,1 (1 SSD and 3 HDD inside) and one external HDD. It tells me the SSD and one internal HDD are read only and it can’t test them. They are not read only; I’ve been reading and writing to them both before and after the test. For the two internal and one external drives it did test the results were what I expected. However, as in the screenshop on this page, there is no indication as to which drive is being tested. Also, when you click the large center button to start the button still says start but has now becom a stop button (It won’t stop anytime soon on its own, it seems to just rerun the test until you stop it. Fine, but change the button to say STOP when its running, freshman programming. I can’t get the settings button to do anything more than flash a menu for about half a second. You get what you pay for I guess. It’s coming off my Mac as soon as I’m done with this review.

Works great.

I put a new mSATA SSD in my 2012 MBPR (using an adapter) and it tested at 50+ MBps faster than the stock drive. And the computer is noticeably more snappy, My only qualm with the app is that it doesn’t report on IOPS, just raw data. One cool thing I was able to do was try the same mSATA drive which clocks in at over 500 MBps in the Macbook in an external mSATA USB 3.0 enclosure. The difference was major, with the enclosure managing only 350MBps read and much slower writes. So the bottom line with that is USB is kind of slow, so buy a Thunderbolt enclosure. Basically the app allowed me to perform science, by testing some setups and validating assumptions, yay!

I deleted it

Giant fake speedometers on a “carbon fiber” dashboard fill much of the screen. Not obvious which disk will be tested. After pressing the start button, the button still says “Start”, and glows with a red border, as if it needs to be pressed again. (Clicking “Start” at this point will STOP the test.) Multiple tests are performed with no indication of which test is being performed, how many tests have been completed, or how many are left to run. After letting it run for several minutes, I clicked “Start” (to stop the test). Presumably the large grid of checkmarks and two columns of numbers—which fluctuated throughout the tests and simply displayed their last values at the end—were supposed to be the results summary.

Blackmagic Disk Speed Test
View in Mac App Store
  • Free
  • Category: Video
  • Updated: Jan 16, 2015
  • Version: 2.2.2
  • Size: 23.0 MB
  • Language: English
  • Seller: Blackmagic Design Inc

Compatibility: OS X 10.6.6 or later

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