Please do not use this developer release for your production solutions.
We've released this preview to enable you to try the feature and give us feedback. This document explains how you can try the developer preview of add-in commands for Office for Mac (Word, Excel, and PowerPoint). For more information about add-in commands, see Add-in commands for Word, Excel, and PowerPoint. You can use add-in commands to extend the Office UI, for example by adding new buttons on the ribbon. There is no need to follow the pre-requisites below anymore as the feature is turned on by default now. Update: Add-in commands for the Mac are now Generally Available with build 15.33+. Developer Preview: Add-in commands for Word, Excel, and PowerPoint on Office for Mac