# Platforms

> Source: https://astrallab.dev/docs/platforms

What works where, and what has been checked on a real machine. Windows is marked plainly as not verified.

| Platform | Developer tools | Status |
| --- | --- | --- |
| macOS | All of them. Page engine: WebKit. | Tested. |
| Linux | All of them. Page engine: WebKitGTK 2.40 or newer. | Tested on X11. Wayland is not verified. |
| Windows | The build ships with the same tools. Page engine: WebView2. | **Not verified on a real machine.** It is compiled and unit-tested in CI only. |

On a system or a Linux install with a WebKitGTK older than 2.40, Developer mode reports that the platform is not supported instead of half working.

## Recordings

Test runs recorded with `record: 'video'` produce an MP4 on **macOS only**. On Linux and Windows the recording is an animated PNG (`recording.png`), with the same frame player in the report.

## Differences worth knowing

|     | macOS | Linux |
| --- | --- | --- |
| Saved credentials | macOS Keychain | Secret Service (GNOME Keyring, KWallet) |
| Page performance | Load timings are measured; layout shift, long tasks and memory are reported as unsupported, never as 0. |     |
| Video of a run | MP4 | Animated PNG |

## The headless runner

[`astral-test`](https://astrallab.dev/docs/ci.md) is published for macOS (Apple Silicon and Intel) and Linux x64. A Windows build may be missing from a release because Windows is not verified yet.