A modern, declarative macOS system configuration using nix-darwin and Home Manager.

1. Install Nix with flakes support:

   curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install

2. Clone and apply this configuration:

   git clone <your-repo-url> ~/.config/nixpkgs
   cd ~/.config/nixpkgs
   nix flake update
   darwin-rebuild switch --flake .#MacBookPro

• TouchID authentication for sudo
• Application firewall enabled with stealth mode
• Secure system defaults
• Privacy-focused DNS (Cloudflare + Google)

• Editors: VS Code Insiders, Zed Preview, Neovim, Emacs
• Version Control: Git with delta diffs, GitHub CLI
• Languages: Go, Node.js, Rust, Python (uv), Lua
• Tools: Docker alternatives (OrbStack, Colima), Kubernetes tools, AWS CLI

• Window Management: Yabai + skhd for tiling
• Productivity: Raycast, Hammerspoon automation
• Fonts: Nerd Fonts collection for programming
• Terminal: Modern shell tools (bat, eza, fd, ripgrep, zoxide)

• Nix: Reproducible system and user packages
• Homebrew: GUI applications and tools not in nixpkgs
• Home Manager: Declarative user environment

This configuration follows modern Nix best practices:

• All dependencies managed through flake.nix
• Pinned inputs for reproducibility
• Support for both stable and unstable nixpkgs

• System Level: darwin/ - macOS system configuration
• User Level: home/ - User-specific settings via Home Manager
• Libraries: lib/ - Reusable helper functions
• Custom Modules: modules/ - Extended functionality

• Legacy Compatibility: default.nix via flake-compat
• Optimized Performance: Binary caches, auto-optimization enabled
• Apple Silicon Support: Native aarch64-darwin configuration
• Secure Defaults: Hardened system preferences

# Rebuild system configuration
darwin-rebuild switch --flake .

# Update all dependencies
nix flake update

# Check configuration before building
nix flake check

# Build without switching (for testing)
darwin-rebuild build --flake .

# Clean up old generations
darwin-rebuild --list-generations
nix-collect-garbage -d

# Optimize Nix store
nix store optimise

# Update specific input
nix flake lock --update-input nixpkgs-unstable

Update user details in flake.nix:

primaryUserDefaults = {
  username = "pritamkadam";
  fullName = "Pritam Kadam";
  email = "[email protected]";
  nixConfigDirectory = "~/.config/nixpkgs";
};

• Nix packages: Add to home/packages.nix
• Homebrew casks: Add to darwin/homebrew.nix
• System tools: Add to home/packages.nix or homebrew

Modify darwin/defaults.nix for:

• macOS system defaults
• Security settings
• UI preferences

.
├── flake.nix              # Main flake configuration
├── flake.lock            # Dependency lock file
├── default.nix           # Legacy compatibility
├── darwin/               # macOS system configuration
│   ├── defaults.nix      # System defaults & security
│   ├── general.nix       # General system settings  
│   ├── homebrew.nix      # Homebrew packages
│   └── bootstrap.nix     # Minimal bootstrap config
├── home/                 # Home Manager configuration
│   ├── packages.nix      # User packages & programs
│   ├── git.nix          # Git configuration
│   ├── fish.nix         # Fish shell setup
│   └── *.nix            # Other configurations
├── lib/                  # Reusable functions
│   └── mkDarwinSystem.nix # Darwin system builder
└── modules/              # Custom modules
    └── darwin/
        └── users.nix     # User management

1. Fork this repository and customize the personal information
2. Review packages in homebrew.nix and packages.nix
3. Adjust system defaults in darwin/defaults.nix to your preferences
4. Test the configuration with darwin-rebuild build --flake .
5. Apply changes with darwin-rebuild switch --flake .

• Build failures: Run nix flake check to validate syntax
• Permission errors: Ensure you're in the admin group
• Homebrew conflicts: Avoid duplicate packages between Nix and Homebrew

• Nix-Darwin Manual
• Home Manager Options
• Nixpkgs Search

This configuration is provided as-is for educational purposes. Feel free to use and modify.