You could have downloaded Parkdale 1.22 for Mac from our application library for free. The software is included in System Tools. This free Mac app was originally designed by the sz development.
From the developer:
Parkdale is a free application that allows you to read and write speed from your harddisks, cdrom devices and network servers in kilobyte, megabyte or even gigabyte per second. This simple program contains three different test modes, from easy to advanded.
You may want to check out more software for Mac, such as GpuTest, CompuBench or ATTO Disk Benchmark, which might be related to Parkdale.