Apple today announced macOS Sierra, the latest version of its Mac software platform and renamed successor to OS X El Capitan. The first beta of the update was seeded to developers earlier today, while a public beta will be released in July.

macOS Sierra will be available as a free software update for compatible MacBook, MacBook Air, MacBook Pro, iMac, Mac mini, and Mac Pro models in the fall. Many 2007 to 2009 Macs that are compatible with OS X El Capitan will not be upgradeable to macOS Sierra, as the cutoff is now at least Late 2009.

The official list of Macs compatible with macOS Sierra:

Late 2009 or Later MacBook



iMac

2010 or Later MacBook Air



MacBook Pro



Mac mini



Mac Pro

To determine your Mac's model year, click on the Apple logo in the top-left menu bar and select About This Mac. The model year is listed in the main Overview tab.

Apple has shared the full video of its WWDC 2016 keynote, where it also introduced iOS 10 alongside new versions of watchOS and tvOS.