Mac OS X version 10.5.8 or later
1GB of RAM recommended
2.5GB of available hard disk space
HFS+ hard disk format (also known as Mac OS Extended or HFS Plus)
1280 x 800 or higher resolution monitor
DVD drive or connection to a local area network (if installing over a network)
Certain online functionality requires a Windows Live ID.
Access to files stored on a SharePoint server requires connectivity to Microsoft Office SharePoint Server 2007 or later
Co-authoring requires SharePoint 2010 or a Windows Live ID.