At WWDC 2017 in June, we expect to see the new version of Mac software.
Apple switched from OS X to MacOS last year and we expect to see a jump to macOS 10.13 at this event. Apple is currently beta testing macOS Sierra 10.12.4.
Count on a developer and a public macOS 10.13 beta after WWDC and then a public macOS 10.13 release date in the fall.
We don't know exactly what features this will deliver yet, but we will learn about them at WWDC 2017 when Apple shows off the new software.
Expect this to arrive as a free upgrade that works on many older macs.