diff --git a/script/install.d/75-arc.sh b/script/install.d/75-arc.sh
new file mode 100644
index 0000000..38ce5c0
--- /dev/null
+++ b/script/install.d/75-arc.sh
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# -----------------------------------------------------------------------------
+# Description:
+#   (macOS only) Install Arc Browser.
+#
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    if ! brew list arc &> /dev/null; then
+        brew install --cask arc
+    else
+        echo "Arc Browser is already installed."
+    fi
+fi