Add note about SDL2 installation instructions
@@ -53,6 +53,9 @@ Running the demo is as simple as:
$ cd demo/native
$ RUSTFLAGS="-C target-cpu=native" cargo run --release
+The SDL 2 library requires some additional manual installation steps. Follow the
+[`rust-sdl2` installation instructions](https://github.com/Rust-SDL2/rust-sdl2#sdl20-development-libraries) to make sure the libraries are installed.
+
On macOS, it is recommended that you force the use of the integrated GPU, as issues with Apple's
OpenGL drivers may limit performance on discrete GPUs. You can use
[gfxCardStatus.app](https://gfx.io/) for this.
