Official specs from Steam

Stardew Valley 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 Vista or greater
Processor2 Ghz
Memory2 GB RAM
Graphics256 mb video memory, shader model 3.0+
DirectXVersion 10
Storage500 MB available space

macOS minimum

OSMac OSX 10.10+
Processor2 Ghz
Memory2 GB RAM
Graphics256 mb video memory, OpenGL 2
Storage500 MB available space

FAQ

What graphics card do I need for Stardew Valley?

Minimum: 256 mb video memory, shader model 3.0+.

How much RAM does Stardew Valley need?

Stardew Valley needs 2 GB RAM at minimum.

How big is Stardew Valley?

Stardew Valley requires 500 MB available space.

Does Stardew Valley run on Mac or Steam Deck/Linux?

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