mpv is missing features on Darwin

[leungbk]

Describe the bug

1. Pressing f to go into full-screen mode doesn't work (other keys like q work as normal).
2. When not in full screen, the title bar and the quit/minimize/maximize buttons should not be visible under most circumstances; this is the behavior I observe when using mpv via Homebrew. However, a Nix-installed version of mpv does show the title bar and such.

Steps To Reproduce

nix-shell -p --pure mpv on aarch64-darwin.

Expected behavior

1. f should go into full-screen mode
2. Title bar and friends should not generally be visible even when not in full-screen mode

Notify maintainers

@marsam

He seems to be the most recent contributor to the mpv recipe who uses Darwin. I know he's not listed as a maintainer for mpv, but I don't think anybody on the maintainer list actually uses Darwin.

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

 - system: `"aarch64-darwin"`
 - host os: `Darwin 21.3.0, macOS 12.2.1`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.6.0`
 - channels(root): `"darwin, home-manager-22.05pre347261.6d8215281b2, nixpkgs-22.05pre345869.46821ea01c8"`
 - channels(brian): `"darwin, home-manager-22.05pre347261.6d8215281b2"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`

[veprbl]

This is probably because we use the deprecated cocoa backend, because we don't have swift: #37473

[Enzime]

Before Swift support is added to Nixpkgs, you can use IINA in the meantime which is built around libmpv and currently available in Nixpkgs.

https://iina.io/

[Atemu]

Note that our IINA is a binary package.