Enlarge / The macOS Sierra beta running on a MacBook Pro. (credit: Andrew Cunningham)

SAN FRANCISCO—Apple will release the final version of macOS 10.12 Sierra to the public on September 20th. The company made the announcement on its web site during its September product event today.

Aside from being called “macOS” now, Sierra brings a handful of big new features and a longer list of minor tweaks. We covered most of that ground in our preview of the developer build of the software (and we’ll cover it all again in more depth in our full review), but the short list includes Siri, proximity-based Apple Watch unlocking, Apple Pay on the web, and more.

Sierra runs on many current Macs, but for the first time since OS X 10.8 Mountain Lion launched in 2012 Apple is leaving some older hardware behind. The affected hardware is mostly from 2007, 2008, and 2009, so if you’ve bought something since the turn of the decade you should generally be safe. The full supported list is below: