DiracLive 3.3.3 for Mac can be downloaded from our website for free. The software lies within System Tools, more precisely Device Assistants. This free Mac app was originally designed by Dirac Research AB.
From the developer:
Dirac Live is a digital room correction software application that lets you hear your music - not your room. Room reflections and misaligned speakers will cause sounds to arrive at your ears with different time delays, blurring the sound image. Using Dirac Live, you will have an improved localization of sound events, or staging.
You may want to check out more software for Mac, such as par2formac, Missing Sync for Palm Pre or FourEyes3D, which might be similar to DiracLive.