Starting with update 1.9 Mac support is here.
I've been experimenting with mac builds, help test if you can https://github.com/big-ab-games/robo-instructus/issues/229
For now, anyone that purchases here & wants a steam key, send me an email and I'll send you one manually.
They don't, but purchases on steam do. Do you think I should provide them?
The main barrier to this is that I don't have a mac. I would like to support this platform, if the game does ok I'll make it happen somehow.