See Using product keys with Office 365, Office 2016, or Office 2013. Where do I find my Office for Mac 2011 product key? Once you have your product key, see Activate Office for Mac 2011. When you install or reinstall Microsoft Office, you are prompted to enter the product key. The product key is used during installation to 'unlock' the software.
Mac Product Key Finder Pro is a very useful app that is designed to safeguard any* activation keys for software that is installed on your Mac.
![Product Product](https://screenshots.macupdate.com/JPG/36175/36175_1557996506_scr.jpg)
Mac Product Key Finder Pro is able to scan local and network connected Macs for any installed software and locate the installed software serial numbers. You can then print or save license information into a file for safe keeping.
Mac Product Key Finder Pro could come in useful for backup purposes to save all your serial numbers before you erase a HDD, for instance. In addition, Mac Product Key Finder Pro can scan different partitions or hard-drives, network attached Mac computers and TimeMachine backups as well.
*The current version supports 374 apps.
NOTE: Microsoft Office 2011 is NOT supported, and unfortunately, since it's encrypted, it cannot be added. Only Office 2008 and beta version of 2011 are supported.
NOTE 2: Aperture, Final Cut, Logic Studio and Roxio Toast Titanium are NOT supported also. These keys are also encrypted.
![Mac product key finder for mac Mac product key finder for mac](https://dl1.cbsistatic.com/i/2018/03/26/4d26855c-a84f-4deb-9229-c0edaeaabf54/6a17c67630a32a0ce19772c6cf3e9f82/imgingest-1169126610568225399.png)
NOTE 3: Mac Product Key Finder Pro will not work on apps you purchased through Mac AppStore, since they simply come without serial numbers.