some darwin adjustments: show extensions, git-lfs

nix/system/darwin-configuration.nix

@@ -1,11 +1,13 @@
 { config, pkgs, ... }:
 
 {
+
   nixpkgs.config.allowUnfree = true;
   # List packages installed in system profile. To search by name, run:
   # $ nix-env -qaP | grep wget
   environment.systemPackages =
     [
+      pkgs.git-lfs
       pkgs.vim
       pkgs.iterm2
       pkgs.obsidian
@@ -19,7 +21,6 @@
       # pkgs.spotify
       # pkgs.firefox
       # pkgs.google-chrome
-      # git-lfs
     ];
 
 
@@ -53,6 +54,10 @@
     remapCapsLockToEscape = true;
   };
 
+  system.defaults = {
+    finder.AppleShowAllExtensions = true;
+  };
+
   # Used for backwards compatibility, please read the changelog before changing.
   # $ darwin-rebuild changelog
   system.stateVersion = 4;