Apple is holding a media event on October 27 to refresh Macs and we’re pretty sure that the upcoming machines will run macOS Sierra 10.12.1 out of the box. Currently being beta-tested, macOS Sierra 10.12.1 includes, among other things, support for Portrait albums in Photos.
Apple is also beta-testing iOS 10.1 which, too, packs in support for a new Portrait mode on dual-camera iPhone 7 Plus models. If the Sierra update drops ahead of new Macs, so should iOS 10.1.
We believe iOS 10.1 will release for public consumption next Tuesday, October 25, two days before the Mac event, and here’s why.