diff --git a/emacs/init.el b/emacs/init.el
index d641073..a14eb48 100644
--- a/emacs/init.el
+++ b/emacs/init.el
@@ -733,7 +733,8 @@
   :ensure t
   :custom
   (magit-save-repository-buffers 'dontask)
-  (magit-git-executable "/usr/bin/git")
+  ;; On Mac, use system git because Nix-installed git is very slow under magit
+  (magit-git-executable (if ON-MAC "/usr/bin/git" "git"))
   :bind (("C-x g" . magit-status)
          :map magit-mode-map
          (":" . execute-extended-command)