cocoa:set-ns-size*

(cocoa:set-ns-size* size width height)

Sets an NSSize -- a vector of at least two elements, or a foreign object of the type -- to #(width height) and answers it. Part of the macOS-only cocoa package, beside objc. See the macOS GUI guide.

CL-USER> (cocoa:set-ns-size* (make-array 2) 640 480)
#(640 480)