Microsoft AutoUpdate for the Macintosh, which comes with Office, keeps your Microsoft software up to date automatically. There is no need to search for critical updates and information; AutoUpdate delivers them directly to your computer. However, you can also use AutoUpdate manually when you want to check for updates.
From the Help menu, click Check for Updates. If you see a list of available updates, click the box next to the updates that you want to install, click Install, then, when prompted, enter the user name and password for an account that has administrator privileges on your computer.
Microsoft also provides a Web site where you can go and view updates that are available for Microsoft products that run on a Macintosh. Select the updates that you need from the list provided.