Test Hard Drive Read, Write Speed In Mac OS X Lion & Leopard With Blackmagic Disk Speed Test

Disk Speed Test (by Blackmagic) is a hard disk benchmarking application for Mac OS X. It quickly measure and certifies the read/write rate of your hard disk, so that you can access it’s performance and quality. This can be quite useful to determine if your hard drive is slowing down due to some reason or if it requires some sort of tweaking to enhance it’s speed. For example, sometimes a hard drive’s performance can be affected due to strained system resources, like in the case of high CPU and RAM consumption.

Moreover, some SSD’s make their benchmark speeds appear faster than what they may actually be capable of. Blackmagic Disk Speed Test measures the true speed of these SSD’s, so that you are able to determine if they are suitable for high quality uncompressed video capture. Disk Speed Test (application) can hence, help you evaluate both performance and readability of your hard drive.

To start hard disk benchmarking, click the Start button. This will initiate your hard drive speed test by using large blocks of data. Before starting the hard drive read & write benchmark test, you can also specify target drive and the amount of load that you wish to put on your hard drive. This can be configured from Settings option (located between read and write meters).


The main window of  Disk Speed Test, shows the video qualities which are supported by your hard drive. For example, it marks a tick for 10 Bit RGB 4:4:4 column (NTSC and PAL) during testing. This essentially means that your hard disk will perform smoothly with this video format.

Please Note: This application puts the hard drive under extreme stress, therefore it is advised that you save your work before initiating the test.

Bloackmagic Disk Speed Test works with the following Mac OS X versions:

  • Mac OS X 10.6 Snow Leopard
  • Mac OS X 10.7 Lion

Get Blackmagic Disk Speed Test