Rendering doesn't work on MacOS

[jz448]

Running both examples on MacOS Monterey (version 12.1). The training was successful but no window was shown when "rendering champion..." is outputted.

$ RUST_LOG=info cargo run --example cart_pole --release --features="cosyne"
 INFO  cosyne::cosyne > gen 0, champion fitness: 129.0000
 INFO  cosyne::cosyne > gen 1, champion fitness: 129.0000
 INFO  cosyne::cosyne > gen 2, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 3, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 4, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 5, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 6, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 7, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 8, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 9, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 10, champion fitness: 261.0000
 INFO  cosyne::cosyne > gen 11, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 12, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 13, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 14, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 15, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 16, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 17, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 18, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 19, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 20, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 21, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 22, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 23, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 24, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 25, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 26, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 27, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 28, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 29, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 30, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 31, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 32, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 33, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 34, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 35, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 36, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 37, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 38, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 39, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 40, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 41, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 42, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 43, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 44, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 45, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 46, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 47, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 48, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 49, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 50, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 51, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 52, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 53, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 54, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 55, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 56, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 57, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 58, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 59, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 60, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 61, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 62, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 63, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 64, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 65, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 66, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 67, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 68, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 69, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 70, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 71, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 72, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 73, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 74, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 75, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 76, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 77, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 78, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 79, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 80, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 81, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 82, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 83, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 84, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 85, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 86, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 87, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 88, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 89, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 90, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 91, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 92, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 93, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 94, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 95, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 96, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 97, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 98, champion fitness: 400.0000
 INFO  cosyne::cosyne > gen 99, champion fitness: 400.0000
champion: (ANN { num_inputs: 4, num_outputs: 1, layers: [Layer { input_len: 4, output_len: 1, gene_len: 5, activation: Relu, weights: Matrix { data: VecStorage { data: [0.07007277006795642, -0.23631177830558103, 0.44346640185648933, 0.13902369122718516], nrows: Dynamic { value: 1 }, ncols: Dynamic { value: 4 } } }, biases: Matrix { data: VecStorage { data: [0.5129485592119563], nrows: Dynamic { value: 1 }, ncols: Dynamic { value: 1 } } }, act: Matrix { data: VecStorage { data: [0.0, 0.0, 0.0, 0.0], nrows: Dynamic { value: 4 }, ncols: Dynamic { value: 1 } } }, act_func: 0x10c1714a0, net: Matrix { data: VecStorage { data: [0.0], nrows: Dynamic { value: 1 }, ncols: Dynamic { value: 1 } } } }], num_genes: 5 }, 400.0)
training time: 0ms
rendering champion...            <--- Nothing happens

[joeagriffith]

This isn't supposed to render an image to the screen, it creates a .gif of the champion being run through the environment, which can then be opened and viewed at your leisure.