Yes, legally, in three ways:
The most reliable way to use Microsoft Office for free on an older Mac is through . This version does not require installation and runs directly in your web browser. Microsoft Office For Mac Os X 10.11 6 Free Download
Office 365, Office 2019, and newer require at least macOS 10.14 or later to receive updates or, in many cases, to install at all. Yes, legally, in three ways: The most reliable
However, it is entirely possible to get a functional, safe, and legal version of Office running on El Capitan. Here is how to approach it. in many cases