After you activate the software product, a. I didn’t want to be in violation of my service agreement with Microsoft so I decided to deactivate the serial from 2 of those 3 computers.Īfter a great deal of searching with my incredible Google skills I found the only way to deactivate a serial in Microsoft Office 2011 for Mac. Read 18 user reviews of Mac Product Key Finder on MacUpdate. I didn’t even mean to find this out and, after purchasing 5 different copies, I mistakenly used the same serial on 3 different computers and have not received any errors when working in the program simultaneously. Microsoft Office 2011 Home and Student Digital Product Key Card. This is probably because they also did not put any mechanism in place to stop you from installing your version of Microsoft Office 2011 for Mac on as many computers as you want. Update Microsoft Office for Mac Home and Student 2011 when you buy a keycard license. Microsoft did not make it very easy to deactivate a product key for Microsoft Office 2011 for Mac.