The Office 2016 productivity suite received a pretty big update on macOS yesterday. The January 2018 release introduces real-time collaborative editing in Word, Excel and Powerpoint, automatic saves for all documents stored in the cloud as well a version history feature to access earlier versions. Just like with Office 2016 for Windows, real-time collaboration with auto-save requires an Office 365 subscription on the Mac.
This releases delivers several other new features including quicker access to your Sites and Groups, additional charts and functions in Excel and an easy way to research a topic with PowerPoint QuickStarter. Outlook for Mac has also been updated with support for Google Calendar and Contacts and the ability to archive or delete items with just one swipe.
The full release notes for the January 2018 release can be seen on this page. It's a pretty big release overall, even though there was nothing new for OneNote this month. There is still a feature gap between Windows and macOS, but Office 2016 for Mac remains the best productivity suite available on the Mac, especially if you have an Office 365 subscription.