How can I update Microsoft Office for Mac?
To update Office on a Mac, run the Microsoft AutoUpdate utility:
  1. Open any Office application, like Word or Excel.
  2. Go to the Help menu and select Check for Updates.
  3. Click  Check for Updates.
  4. Follow the prompts to search for and install any available updates.
  5. Repeat the above steps until the There are no updates available for your Microsoft software at this time. Please check again later. to fully update Microsoft Office.