[jallmann]

I use nixpkgs on MacOS, is nix-darwin is a different project?

I love Nix but it probably has too many rough edges for the typical homebrew user.

[tymscar]

Its a different complementary thing. It lets you define your macos settings the same way you would on nixos

[pxc]

it's worth noting for Homebrew users that it also has a nice built-in module for managing a Homebrew installation by generating a Brewfile for you. So you can transition at your own pace, if you like