AJA KONA System Test 9.0.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program belongs to System Tools. This free Mac app is a product of AJA Video Systems. We recommend checking the downloaded files with any free antivirus.
From the developer:
Check the performance of any drive on your system to ensure it is tuned for the performance you need.
Now Gatekeeper certified for OS X Mountain Lion.
You may want to check out more software for Mac, such as AJA System Test, HELIOS File System Test or Bass System Test, which might be similar to AJA KONA System Test.