DCXClient 1.0 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Rolf Stute Engineering. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. DCXClient for Mac lies within System Tools, more precisely Device Assistants.
From the developer:
DCX.Client is the interface to control your DCX2496 device remotely. The application can adjust the input level or the EQ and X-Over settings, the Limiter and many more. You can control up to 16 DCX2496 with a single app. The program supports password protection to avoid re-adjustment.
You may want to check out more software for Mac, such as SpaceReporter, iSurveill or GPUInfoMenu, which might be related to DCXClient.