I'm looking for a similar (calm) game like Portal 1/2 or Firewatch that I can play on macOS with a similar vibe. The last time I played a game is years ago, and I wish I had at least once a week a nice single-player game that I can play 1-2 hours. =)
I enjoyed Portal because I had to plan out what I'm doing before I act (without being pressured to act), the atmosphere of the game was legendary and I liked that little robot following me. Firewatch had a calm amazing story, there was no 'action' but sometimes that feeling that something could happen. It was a nice exploring game.
Space Sprouts: calm, cosy, whimsical, physics based.
Opus Magnum: machine-building puzzles loosely based on alchemical lore. The puzzle objectives tie into a story that is kind of just window dressing, but interesting enough.