Official specs from Steam

Don't Starve system requirements

Minimum and recommended PC specs as listed by the developer on Steam. Native macOS version available. Native Linux build available.

Minimum

OS *Windows XP/Vista/Windows 7/Windows 8
Processor1.7+ GHz or better
Memory1+ gigs of RAM GB RAM
GraphicsRadeon HD5450 or better; 256 MB or higher
DirectX®9.0c
Hard Drive500 MB HD space
Sound100% DirectX9.0c compatible sound card and drivers

macOS minimum

OSLion (OSX 10.7.X)
Processor2.0 GHz Intel
Memory4 GB RAM
Graphics256 MB NVidia or ATI graphics card
Hard Drive512 MB Free Space
AdditionalNot recommended for Intel GMA Graphics or Mac Minis or early-generation MacBooks

FAQ

What graphics card do I need for Don't Starve?

Minimum: Radeon HD5450 or better; 256 MB or higher.

How much RAM does Don't Starve need?

Don't Starve needs 1+ gigs of RAM GB RAM at minimum.

How big is Don't Starve?

Don't Starve requires 500 MB HD space.

Does Don't Starve run on Mac or Steam Deck/Linux?

Yes, there is a native macOS version. A native Linux build is available.