Up to date documentation: https://docs.avaloniaui.net/docs/supported-platforms

• .NET Core 3.1+ for Windows 8 and above.
• Windows 7 and below are not officially supported.

• .NET Core 3.1+
• Debian 9 (Stretch)+
• Ubuntu 16.04+
• Fedora 30+
• Skia is built against glibc. If your distro uses something else instead, you need to build your own libSkiaSharp.so at https://github.com/mono/SkiaSharp

• .NET Core 3.1+
• macOS High Sierra 10.13+