Apple issues third macOS Sierra beta to developers

in macOS edited July 2016
Completing Monday's batch of beta software seeds, Apple this afternoon issued a third beta version of its upcoming macOS Sierra desktop operating system to developers ahead of an expected public release this fall.

The latest macOS Sierra version, dubbed build 16A254g, fixes a number of bugs discovered during the ongoing test period, including resolutions to system software issues impacting About This Mac, Apple Pay, Auto Unlock, Back to my Mac, CoreImage, Installer and Siri. Flaws found in first party apps like Aperture, Mail, Notes, Photos and Safari were also fixed.

Today's release comes two weeks after the second macOS Sierra beta was seeded to developers earlier this month. Apple also issued a public beta through its Apple Beta Software Program to accelerate the testing process.

Announced at the Worldwide Developers Conference in June, Apple's latest desktop operating system will bring a variety of enhancements to Macs when it sees release this fall, including built-in support for the company's Siri virtual assistant and Apple Pay for the web.

Developers can download macOS Sierra from Apple's Developer Portal or the Mac App Store. Like past macOS Sierra builds, support for the latest beta version is limited to late-2009 or newer MacBooks and iMacs, and 2010 or newer MacBook Air, MacBook Pro, Mac mini and Mac Pro models.


  • Reply 1 of 5
    zozmanzozman Posts: 393member
    On beta 2 my MacBook has had issues waking from sleep.
    hopefully this will fix this problem. 
  • Reply 2 of 5
    sockrolidsockrolid Posts: 2,789member
    Really like the Auto Unlock feature.
    Looking forward to using Apple Pay on my Macs.
  • Reply 3 of 5
    beta 3 is overall actually quite stable
  • Reply 4 of 5
    MacProMacPro Posts: 19,382member
    Anyone discovered if RAID created with Disk Utilities in 10.12 is multi-threaded?  I can't find any reference to this anywhere.
  • Reply 5 of 5
    Mac air 2013. 3 very unstable. Mail crashes, Safari hangs or crashs. Disk First Aid says Recovery mode. Recovery Mode Disk First Aid says "no problems"
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