I thought we were promised a game that would work on computers that were able to run the first game. I thought the system requirements were the same for both games. yet for some extremely sad and disappointing reason, every time I start a new game and get through the “walking through darkness on a path“ part, the game goes to a loading screen, shows the gauntlet cursor, then goes to the spinning Mac wheel thing that happens when something has frozen or crashed. it does not advance beyond this point. What do I have to do? I’ve turned all graphics settings off or down to the lowest value. I’ve restarted my computer. This Mac ran the first game perfectly fine, what the hell is going on here? Please don’t tell me I have to wait for the PS4 version...

This doesn't sound like an issue of specs, more like a bug, so I checked the dev forum and it's apparently a known issue on mac: https://forums.obsidian.net/topic/97389-mac-unable-to-start-game-black-screen/.

Soo, good news, you won't need a new computer to play. Bad news, you'll need to wait for a patch.