Oh gosh, I really know absolutely nothing about computers and specs... But my computer is a macbook air 13" early 2015. The OS is the newest version of macOS Mojave... Hope this helps...
And I have tried downloading both of the mac files, but got the same result from both. I have loved your games since the first Ascension game came out, and I would really love to be able to play this one, so I was really bummed out when it didn't work... :(