Second public betas of iOS 10, macOS Sierra now available
Members of Apple's Beta Software Program can now download and try the second public beta releases of iOS 10 and macOS Sierra, which were seeded on Wednesday.

The new betas carry the same build numbers as Monday's developer betas, with iOS 10 listed as 14A5309d, and Sierra sporting build 16A254g.
Scheduled for a fall release, iOS 10 includes major notification improvements, third-party app support in Siri, and many updates to native apps. A list of fixes and changes in the new beta was not immediately available.
The new Sierra build includes changes to Apple Pay, Back to My Mac, CoreImage libraries, Installer routines, Mail, Safari, and Siri.
Device-wise, iOS 10 requires at least an iPhone 5, iPad 4, iPad mini 2, or sixth-generation iPod touch. macOS Sierra is compatible with a wide range of Macs, some dating back to 2009.
Apple's tvOS and watchOS are not included in the public beta program.

The new betas carry the same build numbers as Monday's developer betas, with iOS 10 listed as 14A5309d, and Sierra sporting build 16A254g.
Scheduled for a fall release, iOS 10 includes major notification improvements, third-party app support in Siri, and many updates to native apps. A list of fixes and changes in the new beta was not immediately available.
The new Sierra build includes changes to Apple Pay, Back to My Mac, CoreImage libraries, Installer routines, Mail, Safari, and Siri.
Device-wise, iOS 10 requires at least an iPhone 5, iPad 4, iPad mini 2, or sixth-generation iPod touch. macOS Sierra is compatible with a wide range of Macs, some dating back to 2009.
Apple's tvOS and watchOS are not included in the public beta program.
Comments
Thanks for any help
That first release has been a very bumpy ride.... Mail.app has been a dog
Yes on Beta 1 and this morning on Beta 2.
BTW OS X 10.12 seems very solid indeed (I am saying this for the three of us still using Macs). I am on the Developer beta 3 and have yet to find an issue. Although I'd love to know if RAID is fully multi threaded. No one on the developer forums has answered me yet. Anyone here read that anywhere? It was SoftRAID's claim to fame while Apple's was single threaded. I saw a speed gain with my 12 cores in RAID 0 when 10.11 dropped RAID and I was forced to SoftRAID which I can only assume was due to multi-threading. I'd go back to Apple if it is I think.