In addition to macOS Sierra Public Beta, Apple is also launching the iOS Public Beta today. You can get all of the sign-up and download information from Apple’s beta Web site.
iOS 10 Beta has worked very well for me so far. I love many of the new features included in the latest release, but please remember, this is not a completed OS release—this is a beta.
That means that some of the functionality will not work properly, apps may not work properly, and the experience may not be what you expect. If you plan to install it, do it on a secondary device, not the one you use every day.
Any word if the Watch will also get a public beta? Would be great to try the Auto Unlock feature once my Mac gets the Sierra beta.
I’m not sure but seems doubtful. IMO main reason is there’s no way to DFU the watch unlike the other devices to go back in case it’s “too unstable” ;; saying that b2 is far more stable on my 42mm, a 38mm in my tester circle was solid on b1, and now getting triple the battery life of the 42! It’s very impressive. Speed increase the best IMO