Known issues with Office for Mac on MacOS 10.7 (Lion)
You can find more information concerning Lion (10.7) compatibility on the following KB article: Office for Mac 2011 and Mac OS X 10.7 Lion You can find that blog post by following the link below: The Office for Mac team recently posted a blog post concerning Lion compatibility. Because Lion no longer supports Rosetta, applications that relied on it will Previous MacOS versions supported Rosetta, an Apple Mac OSX bridge technology that enabled applications such as Office for Mac 2004 to run on the latest chip architecture for Mac. Office for Mac 2004 will not run on Lion.