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.
Simple and solid...
I am confused by the negative reviews - this may not be the simplest application out there, but it is not complicated. And, it is free... I just needed to check the speed of my sdxc card and this application was recommended. A simple download, click the settings icon, tell it which drive to test and the size of the test units ( I chose the 5G ) and then hit start. You see it write and then you see it read - the dials give the speeds of each activity in real time as the tests shift back and forth each test cycle.
I have a MBP and have no issue with the graphic fitting on the screen, but maybe if your resolution is low - this might cause an issue, I did not see this issue myself. However, if you need, you can move the window to see the upper or lower parts of the window. I went ahead and tested my internal ssd flash drive while I was there - happy to say that the read is so fast that it appears to max out the program's ability to measure, about this I have no complaint… My thanks to BlackMagic.
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.
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!