Microsoft recently released Office 2016 for Mac to Office 365 customers. Caltech’s Office 365 subscription allows access.caltech account holders to download and install Office 2016 for Mac on up to 5 devices. Instructions to install Office 2016 for Mac can be found here. Note that to install Office 2016, you must be running OS X 10.10 (Yosemite) or later.
Also note that campus system administrators that manage labs or multiple machines should not use the Office 365 version of Office 2016 for Mac due to the 5 device install limit. The campus site licensed version of Office 2016 for Mac will be available for download from the http://software.caltech.edu webstore upon release to volume licensing customers.