diff --git a/modules/services/home-manager-auto-expire.nix b/modules/services/home-manager-auto-expire.nix
index cb60417c..2f98d205 100644
--- a/modules/services/home-manager-auto-expire.nix
+++ b/modules/services/home-manager-auto-expire.nix
@@ -55,6 +55,8 @@ in
           as the `OnCalendar` option.
 
           The format is described in {manpage}`systemd.time(7)`.
+
+          ${lib.hm.darwin.intervalDocumentation}
         '';
       };
 
@@ -104,6 +106,23 @@ in
           };
         };
       })
+
+      (lib.mkIf pkgs.stdenv.isDarwin {
+        assertions = [
+          (lib.hm.darwin.assertInterval "services.home-manager.autoExpire.frequency" cfg.frequency pkgs)
+        ];
+
+        launchd.agents.home-manager-auto-expire = {
+          enable = true;
+          config = {
+            ProgramArguments = [ (toString script) ];
+            ProcessType = "Background";
+            StartCalendarInterval = lib.hm.darwin.mkCalendarInterval cfg.frequency;
+            StandardOutPath = "${config.home.homeDirectory}/Library/Logs/home-manager-auto-expire/launchd-stdout.log";
+            StandardErrorPath = "${config.home.homeDirectory}/Library/Logs/home-manager-auto-expire/launchd-stderr.log";
+          };
+        };
+      })
     ]
   );
 }
diff --git a/tests/default.nix b/tests/default.nix
index 40a858d7..f6d41e4b 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -335,6 +335,7 @@ import nmtSrc {
       ./modules/services/emacs-darwin
       ./modules/services/espanso-darwin
       ./modules/services/git-sync-darwin
+      ./modules/services/home-manager-auto-expire-darwin
       ./modules/services/imapnotify-darwin
       ./modules/services/jankyborders
       ./modules/services/macos-remap-keys
diff --git a/tests/modules/services/home-manager-auto-expire-darwin/basic-configuration.nix b/tests/modules/services/home-manager-auto-expire-darwin/basic-configuration.nix
new file mode 100644
index 00000000..6b094ae4
--- /dev/null
+++ b/tests/modules/services/home-manager-auto-expire-darwin/basic-configuration.nix
@@ -0,0 +1,14 @@
+{
+  services.home-manager.autoExpire = {
+    enable = true;
+    frequency = "weekly";
+  };
+
+  nmt.script = ''
+    serviceFile=LaunchAgents/org.nix-community.home.home-manager-auto-expire.plist
+    assertFileExists "$serviceFile"
+
+    serviceFileNormalized="$(normalizeStorePaths "$serviceFile")"
+    assertFileContent "$serviceFileNormalized" ${./expected-agent.plist}
+  '';
+}
diff --git a/tests/modules/services/home-manager-auto-expire-darwin/default.nix b/tests/modules/services/home-manager-auto-expire-darwin/default.nix
new file mode 100644
index 00000000..1f42ebfe
--- /dev/null
+++ b/tests/modules/services/home-manager-auto-expire-darwin/default.nix
@@ -0,0 +1,4 @@
+{
+  darwin-home-manager-autoExpire-service-basic-configuration = ./basic-configuration.nix;
+  darwin-home-manager-autoExpire-frequency-assertion = ./frequency-assertion.nix;
+}
diff --git a/tests/modules/services/home-manager-auto-expire-darwin/expected-agent.plist b/tests/modules/services/home-manager-auto-expire-darwin/expected-agent.plist
new file mode 100644
index 00000000..fb3878d1
--- /dev/null
+++ b/tests/modules/services/home-manager-auto-expire-darwin/expected-agent.plist
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>Label</key>
+	<string>org.nix-community.home.home-manager-auto-expire</string>
+	<key>ProcessType</key>
+	<string>Background</string>
+	<key>ProgramArguments</key>
+	<array>
+		<string>/nix/store/00000000000000000000000000000000-home-manager-auto-expire</string>
+	</array>
+	<key>StandardErrorPath</key>
+	<string>/home/hm-user/Library/Logs/home-manager-auto-expire/launchd-stderr.log</string>
+	<key>StandardOutPath</key>
+	<string>/home/hm-user/Library/Logs/home-manager-auto-expire/launchd-stdout.log</string>
+	<key>StartCalendarInterval</key>
+	<array>
+		<dict>
+			<key>Hour</key>
+			<integer>0</integer>
+			<key>Minute</key>
+			<integer>0</integer>
+			<key>Weekday</key>
+			<integer>1</integer>
+		</dict>
+	</array>
+</dict>
+</plist>
\ No newline at end of file
diff --git a/tests/modules/services/home-manager-auto-expire-darwin/frequency-assertion.nix b/tests/modules/services/home-manager-auto-expire-darwin/frequency-assertion.nix
new file mode 100644
index 00000000..568d2043
--- /dev/null
+++ b/tests/modules/services/home-manager-auto-expire-darwin/frequency-assertion.nix
@@ -0,0 +1,10 @@
+{
+  services.home-manager.autoExpire = {
+    enable = true;
+    frequency = "00:02:00";
+  };
+
+  test.asserts.assertions.expected = [
+    "On Darwin services.home-manager.autoExpire.frequency must be one of: hourly, daily, weekly, monthly, semiannually, annually."
+  ];
+}