The 3.20.7 version of DEX 3 for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software relates to Audio & Video Tools. We recommend checking the downloaded files with any free antivirus. This Mac application is a product of DIGITAL 1 AUDIO INC.
From the developer:
DEX 3 is professional DJ Software for Mac that allows you to seamlessly mix music, music videos and host karaoke shows. Mix with DEX 3 using just a keyboard or mouse, or use one of the 75 supported DJ controllers for tactile hands-on control. DEX 3 includes an advanced media file browser for all your music, music videos and karaoke files.
You may want to check out more software for Mac, such as PCDJ Dex, PCDJ DEX 3 or Dexed, which might be similar to DEX 3.