Official specs from Steam

Halo: The Master Chief Collection system requirements

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

Halo: The Master Chief Collection release infoSteam page Check other games

Minimum

NoteRequires a 64-bit processor and operating system
OS *Windows 7
ProcessorAMD Phenom II X4 960T ; Intel i3550
GraphicsAMD HD 6850 ; NVIDIA GeForce GTS 450
DirectXVersion 11
NetworkBroadband Internet connection
Storage43 GB available space
Additional NotesDirect3D feature Level 11.1

Recommended

NoteRequires a 64-bit processor and operating system

FAQ

What graphics card do I need for Halo: The Master Chief Collection?

Minimum: AMD HD 6850 ; NVIDIA GeForce GTS 450.

How big is Halo: The Master Chief Collection?

Halo: The Master Chief Collection requires 43 GB available space.

Does Halo: The Master Chief Collection run on Mac or Steam Deck/Linux?

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