Enlarge / The first Sierra developer beta. (credit: Andrew Cunningham)
Both the iOS 10 and macOS Sierra public betas are being released today for testing by the brave and foolish souls who choose to live their lives on the bleeding edge. You'll be able to download the beta from here when it posts in a couple of hours. Sierra drops support for a handful of Macs for the first time in a few years, so here's the hardware support list again if you need it:
- MacBook (late 2009 and later)
- iMac (late 2009 and later)
- MacBook Air (2010 and later)
- MacBook Pro (2010 and later)
- Mac Mini (2010 and later)
- Mac Pro (2010 and later)
The first public beta build of Sierra should be identical or near-identical to the second developer build that was released earlier this week, so if you already have access to that, you won't need to install the public beta. You should be able to continuously upgrade any public beta install with new beta builds all the way up until the Golden Master build is released in the fall, though of course the standard warnings about running beta software on your primary Mac (and backing up your data before installing beta software on anything) all apply.
This build of Sierra should be broadly similar to the one we previewed last month except with a few more bug fixes and some other tweaks. The Siri keyboard shortcut, for example, has been changed from function-space to "hold down command-space," and people with access to the developer beta of WatchOS 3 should be able to use the Apple Watch unlocking feature as long as they have a compatible Mac. We'll continue to track the betas as they're released and we'll do another comprehensive check-in with Sierra when the final version is released in the fall.
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