diff --git a/docs/platforms/mac/dev-setup.md b/docs/platforms/mac/dev-setup.md
index e40bb754c..be1baa0b8 100644
--- a/docs/platforms/mac/dev-setup.md
+++ b/docs/platforms/mac/dev-setup.md
@@ -30,7 +30,11 @@ To build the macOS app and package it into `dist/OpenClaw.app`, run:
 ./scripts/package-mac-app.sh
 ```
 
-If you don't have an Apple Developer ID certificate, the script will automatically use **ad-hoc signing** (`-`). 
+If you don't have an Apple Developer ID certificate, run the following command, which will use **ad-hoc signing** (`-`). 
+
+```bash
+ALLOW_ADHOC_SIGNING=1 ./scripts/package-mac-app.sh
+```
 
 For dev run modes, signing flags, and Team ID troubleshooting, see the macOS app README:
 https://github.com/openclaw/openclaw/blob/main/apps/macos/README.md