Please follow the following steps to install a self-signed certificate for macOS.
The certificate is required for Word Add-in to connect to the GPTLocalhost Server locally.
You can watch this demo video for details..

• Click “Continue” in the following or click “Explain” for more information.

• Next, enter your password to update your Keychain for adding the new certificate.

• In Word, when running GPTLocalhost Add-in for the first time, click “Show Certificate” in the following screen.

• Click Always trust “127.0.0.1” when connecting to “localhost” in the following screen.

• Click “Restart” to use the new certificate.

• Now, GPTLocalhost Server is running and GPTLocalhost Add-in is ready in Word.

Enjoy your productivity boost locally and in private. No cloud-based LLM servers are required.