Official specs from Steam

The Expanse: Osiris Reborn system requirements

Minimum and recommended PC specs as listed by the developer on Steam.

The Expanse: Osiris Reborn release info Steam page Check other games

Minimum

OS	Windows 10

Recommended

OS	Windows 10

FAQ

Does The Expanse: Osiris Reborn run on Mac or Steam Deck/Linux?

There is no native macOS version. There is no native Linux build (Proton compatibility may vary).