SightLine 1.7 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 Solirax. The program lies within Games, more precisely Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
SightLine: The Chair is a surreal experience designed as a demoing tool. It was crafted to throw users into the world of VR, and show off its full potential both in creating variety of worlds that feel real and creating realities that behave unlike anything you might know.
You may want to check out more Mac applications, such as Quiz Builder, Nostromo Array or rpgng, which might be similar to SightLine.