Blackmagic Disk Speed Test
By Blackmagic Design Inc
Open the Mac App Store to buy and download apps.
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.
Good but won’t do RamDisks
Simple app. Run it and let it run for a while and you’ll get an idea of how fast a disk is.
I did want to test a Ram Disk I created on my Mac but despite setting the Stress to 1GB it would not test a 2.5GB Ram Disk - it kept telling me the disk was almost full. Which is a shame because I really only wanted the app to test my Ram Disk.
Still I am probably the exception rather than the rule and it has been very useful.
I have tried all my drives to test them and it provides great and encouraging results. The information provided about what you can do with the disk speed is also very helpful. My Macbook Air was too high for the read speed so that would be the only improvement, making the speedometers bigger!
This won't open in Snow Leopard 10.6.8! Description says compatible with 10.6.6 or later!? Go figure! I'm sure it would be great if it worked for me!!