You can activate Office 2011 in these situations only with a brand new never been used before product key (25 characters). Erased your startup volume and reinstalled using the 2011 installer Replaced your hard drive or SSD drive Attempt to install on a different Mac In these situations, you will have to buy a new product key. For more information, see the Microsoft License Terms for your product. However, you may transfer Office for Mac 2011 to another computer that belongs to you if you experience a hardware failure or you buy a new computer. For one-time purchases of Office for Mac 2011 you can install Office on only one computer.
