metal:device

(metal:device ctx)

The MTLDevice the context draws with -- the GPU itself, and the receiver of every new... selector Metal has. Part of the metal package, a Metal drawing surface written in rontolisp over objc and loaded on first use: macOS (java -jar, the rontolisp binary, or a compiled .class / .jar; never a .wasm), with a display. See the macOS GUI guide.

CL-USER> (objc:send (objc:send (metal:device *ctx*) "name") "UTF8String")
"Apple M4 Max"