Add the nix-darwin input (nix-darwin-26.05, follows nixpkgs) and a mkDarwinHost mirroring mkHost: shared commonModule (nixpkgs/nix settings) is factored out and reused, home-manager is wired via darwinModules, and identity is threaded through specialArgs.
New darwinConfigurations.lyrathorpe-mac (aarch64-darwin) reuses the cross-platform ./lyrathorpe/home modules (shell, git, editor); Linux-only sway/desktop modules are excluded. Build with: darwin-rebuild switch --flake .#lyrathorpe-mac.
Emma Thorpe