Works for me on Debian, maybe posting system info or console messages might help the author to reproduce this...
Luc
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Sounds like it's trying to use the cpu or maybe integrated graphics for rendering rather than your M295X graphics card. On linux, I have a much slower graphics card (MX150) but by using the 'primusrun' command (which makes an application run on the card instead of on integrated graphics) and passing -force-opengl as an argument/parameter to the game, it runs smoothly at high quality.
Maybe running it with -force-opengl already helps? Else I wouldn't know how to fix this on macOS. Good luck!
For linux, I need to run most unity games with this command to get >3fps performance (it otherwise uses the intel chip instead of nvidia):
primusrun './Geographical Adventures.x86_64' -force-opengl
And don't forget to chmod +x the executable to be able to run the game at all. @SebastianL this could also be set in the zip distribution afaik