fxgl/steamac
Valve's official ARM64 SteamOS in a lightweight VM on Apple Silicon: libkrun + Venus + MoltenVK, controllers, CoreAudio sound
From the publisher
README & documentation
Source previewRead the project’s overview, installation instructions and usage examples. The original README is the source of truth.
English · Русский On macOS 15 (Sequoia), Valve's actual SteamOS for Steam Frame runs in a lightweight VM on Hypervisor.framework (libkrun) with GPU acceleration via Venus. Vulkan on Metal — MoltenVK from the UTM fork (geometry shaders, robustness2) + VKEXTdepthclipenable (PR #2712) + our fixes, by default. KosmicKrisp (Mesa's Vulkan driver on Metal 4) is an experimental alternative on macOS 26+ (see “Vulkan driver”). installs its Homebrew dependencies (llvm spirv-llvm-translator spirv-tools vulkan-loader glslang). libkrun; all three use MACOSXDEPLOYMENTTARGET=15.0, including on macOS 26/27 build hosts. Bundling rejects Mach-O deployment targets above macOS 15.0 (KosmicKrisp alone may require 26.0). Build parts separately: ./build.sh host, ./build.sh guest, or the scripts in the table below. The SteamOS image is downloaded from Valve's servers (a signed RAUC bundle); its signature and sha256 are verified. Guest release artifacts have adjacent .inputs.json build receipts binding their selected Git working-tree inputs to their output bytes. Relevant dirty edits…
Read the full README ↗ · Preview checked 2026-10-08T12:54:15.096Z
Inside the original README — Document outline
- steamac — Valve's official ARM64 SteamOS (the Steam Frame image) in a VM on Apple Silicon
- Requirements
- Building and running
- LAN networking and Steam Remote Play
- Settings window
- Suspend
- SteamOS sleep
- Desktop Mode
- Clipboard
- Controller
- FX Steam Launcher.app
- Creating the SteamOS disk without Docker
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What this repository does
Valve's official ARM64 SteamOS in a lightweight VM on Apple Silicon: libkrun + Venus + MoltenVK, controllers, CoreAudio sound
Repository facts
- Owner
- fxgl
- Primary language
- Swift
- Stars
- 205
- Forks
- 7
- Open issues + pull requests
- 8
- License
- Apache-2.0
- Archived
- No
- Default branch
- main
- Created
- 2026-10-04T10:23:35.000Z
- Last push
- 2026-10-07T14:41:45.000Z
Topics and intended use
Owner-supplied topics: apple-silicon, libkrun, macos, moltenvk, proton, steamos
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Source and freshness
Source: GitHub. Metadata observed 2026-10-08T12:06:17.489Z. Daily imports are snapshots, not real-time monitoring.
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