macOS 10.12 beta 2 available to download for developer testing

TL;DR you can now auto-unlock your Mac using your Apple Watch

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Apple has released macOS 10.12 beta 2 to developers for testing. macOS Sierra has new features like Siri, auto-unlock via Apple Watch, iCloud desktop/documents access, optimized storage and much more. The release comes at the same time as Apple’s other operating system releases: iOS 10 beta 2, watchOS 3 beta 2 and tvOS 10 beta 2.

The biggest update in macOS 10.12 beta 2 is the availability of auto-unlock feature via Apple Watch. The feature can be enabled or disabled from System Preferences > Security and Privacy > Allow your Apple Watch to unlock your Mac. This is the first time that an Apple Watch can interact with a Mac, or even any device other than an iPhone.

To use Auto Unlock, you must have:

  1. Two-factor (not Two-step) authentication enabled on your iCloud account
  2. watchOS 3 beta 2 on your Apple Watch

macOS beta 2 available to download for developer testing

Auto-unlock via Apple Watch will allow users to login to their Macs without entering their password, as long as they are wearing their Apple Watch and it is unlocked.

macOS 10.12 beta 2 is available for registered developers to download from Apple Developer website. You can perform a clean install by creating a bootable USB or even dual-boot it with an older OS X version by following our guide. Make sure to check if your Mac is compatible with macOS before proceeding. If you already have macOS 10.12 beta 1 installed, simply open up Mac App Store and navigate to the Updates tab to download it over the air.

Public beta for macOS 10.12 is expected to release this month.