Nixmac

Nixmac is a desktop app for macOS that turns your computer into a reproducible, version-controlled system. Instead of manually tweaking settings or writing complex Nix configuration files, you describe what you want in plain English — and Nixmac writes the Nix code, builds it, and applies it to your machine. It's like having a smart assistant that handles the tedious parts of system configuration, so you can focus on actually using your Mac.

The tool works in a few clear steps. You start from a sensible template (nix-darwin, nixos-unified, or flake-parts) or import an existing flake from GitHub. Nixmac can scan your current Mac to detect settings, packages, and services you've already customized — then turns them into code you can keep. Every change is shown as a line-level diff, applied atomically with automatic rollback on failure, and saved as a git commit with an AI-written message. You can restore any previous state with one click. The AI models are hosted (pay-as-you-go) or you can bring your own API key from Anthropic or OpenAI, or run fully local with Ollama.

Nixmac is ideal for developers and power users who want a reliable, repeatable way to manage their Mac environment — especially those who already use Nix or want to start. It's also great for teams that need consistent setups across multiple machines. The free tier lets you try it without an account, and a Pro plan at $4.99/month adds device sync. The app is open source and built on top of nix-darwin, Nixpkgs, home-manager, Homebrew, Git, and launchd.