PrerequisitesBefore you install the Office for Mac 2011 14.5.6 update, make sure that you have Office for Mac 2011 14.1.0 or a later version installed on your computer. Updated filesFor a complete list of the files that this update adds or changes, double-click the update installer, and then click Show Files on the File menu. The file is stored on security-enhanced servers that help prevent any unauthorized changes to it. Microsoft scanned this file for viruses, using the most current virus-detection software that was available on the date that the file was posted.