The KHAOS add-on for Blender 3d works with Mac and Windows operating systems. Linux is not supported as of right now.
You still have to bake the smoke simulation using Blender. Khaos is here to add the particle systems you want to use inside of your simulation more efficiently. It is not its own smoke simulator.
KHAOS now works with Blender 2.81 as well as Blender 2.82 and the amazing Mantaflow branch!