macOS 10.12 Sierra beta 3 hits the Mac App Store for developers

macOS 10.12 Sierra MacBook

Apple today released the third developer preview of macOS Sierra since showing off the software update for the Mac at WWDC 2016. The latest release is available now through the Mac App Store. macOS Sierra’s headlining feature is Siri on the Mac while beta 2 turned on Auto-Unlock which lets Apple Watch users skip the password login screen. Apple Pay is also coming to Safari with macOS Sierra, although we haven’t seen the feature live on the web yet.

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Testing macOS Sierra currently requires a promo code for registered developers that you redeem through the Mac App Store. If you’re already testing macOS Sierra, you should see the updated version in the Updates section on your Mac. If you’re just jumping in to macOS Sierra testing with beta 3, head to Apple’s developer page to find the promo code associated with your account.

We’ll update with any notable changes found in macOS Sierra beta 3, and catch up on our macOS 10.12 coverage below for all the details:

Apple also started public beta testing macOS Sierra with the previous build. Updates to the public beta usually follow a couple of days after the developer update’s release.

Also give us a shout on Twitter @9to5mac, email us at, or shout in the comments below with anything interesting you discover!

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Avatar for Zac Hall Zac Hall

Zac covers Apple news for 9to5Mac and hosts the 9to5Mac Happy Hour and 9to5Mac Watch Time podcasts.