diff --git a/cmd/mind-map/service.go b/cmd/mind-map/service.go
index 4694826..ea1f676 100644
--- a/cmd/mind-map/service.go
+++ b/cmd/mind-map/service.go
@@ -91,6 +91,7 @@ func newServiceConfig(addr, dir, webui string, idleTimeout time.Duration) *servi
 	if runtime.GOOS == "darwin" {
 		cfg.Option = service.KeyValue{
 			"UserService": true,
+			"RunAtLoad":   true,
 		}
 	} else if runtime.GOOS == "linux" {
 		cfg.UserName = os.Getenv("SUDO_USER")
@@ -170,8 +171,12 @@ var serviceStartCmd = &cobra.Command{
 			return fmt.Errorf("start service: %w", err)
 		}
 		fmt.Println("Service started.")
-		fmt.Printf("  Web UI:       http://%s\n", addr)
-		fmt.Printf("  MCP endpoint: http://%s/mcp\n", addr)
+		// Only print the address if explicitly provided; otherwise the plist
+		// may contain a different addr than the flag default.
+		if cmd.Flags().Changed("addr") {
+			fmt.Printf("  Web UI:       http://%s\n", addr)
+			fmt.Printf("  MCP endpoint: http://%s/mcp\n", addr)
+		}
 		return nil
 	},
 }
diff --git a/install.sh b/install.sh
index bff0e5f..4dbb351 100755
--- a/install.sh
+++ b/install.sh
@@ -78,8 +78,15 @@ mkdir -p "${HOME}/.mind-map"
 
 # Stop existing service before replacing the binary
 if [ -f "${INSTALL_DIR}/mind-map" ]; then
-  sudo "${INSTALL_DIR}/mind-map" service stop 2>/dev/null && \
-    echo "==> Stopped existing mind-map service" || true
+  # On macOS the service is a user LaunchAgent; sudo would look for the plist
+  # under /var/root instead of ~/Library/LaunchAgents, so don't use sudo.
+  if [[ "$(uname -s)" == "Darwin" ]]; then
+    "${INSTALL_DIR}/mind-map" service stop 2>/dev/null && \
+      echo "==> Stopped existing mind-map service" || true
+  else
+    sudo "${INSTALL_DIR}/mind-map" service stop 2>/dev/null && \
+      echo "==> Stopped existing mind-map service" || true
+  fi
 fi
 
 echo "==> Downloading ${TARBALL_NAME}..."