Official specs from Steam

Kerbal Space Program system requirements

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

Kerbal Space Program release infoSteam page Check other games

Minimum

OS *Windows 7 SP1+
ProcessorCore 2 Duo 2.0 Ghz
Memory4 GB RAM
GraphicsDX10 (SM 4.0) capable, 512MB VRAM
Hard Drive3 GB HD space

Recommended

OSWindows 10 64-bit
ProcessorCore i5
Memory8 GB RAM
GraphicsDX10 (SM 4.0) capable, 1GB VRAM
Hard Drive4 GB HD space

macOS minimum

OSmacOS 10.12+ 64-bit
ProcessorIntel
Memory4 GB RAM
GraphicsSM 4.0 512MB VRAM
Hard Drive3 GB HD space

macOS recommended

OSmacOS 10.12+ 64-bit
ProcessorIntel Core i5
Memory8 GB RAM
GraphicsSM 4.0 1GB VRAM
Hard Drive4 GB HD space

FAQ

What graphics card do I need for Kerbal Space Program?

Minimum: DX10 (SM 4.0) capable, 512MB VRAM. Recommended: DX10 (SM 4.0) capable, 1GB VRAM.

How much RAM does Kerbal Space Program need?

Kerbal Space Program needs 4 GB RAM at minimum, 8 GB RAM recommended.

How big is Kerbal Space Program?

Kerbal Space Program requires 3 GB HD space.

Does Kerbal Space Program run on Mac or Steam Deck/Linux?

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