Microsoft continues to provide you with verified secure installs to your machine. With the recent change in the Apple operating system 10.8, when you launch the installer of earlier versions of Office for Mac 2011 you may encounter an alert indicating that the installation is from an unidentified source. In order to complete launch of the product we suggest you follow Apple’s instructions for overriding the security setting. You can locate these instructions from the ‘?’ button in the alert or for more information please go to http://go.microsoft.com/fwlink/?LinkId=255462