Is there a list of officially-supported Mac models on to which macOS Sierra can be installed?
I presume it is the same as OS X El Capitan as there does not appear to be many changes which would warrant removing some models of Mac from the supported list, but I can't seem to be able to confirm this.
Best Answer
The Keynote announced the following supported hardware:
All later models are unquestionably compatible. A public list (on Apple's website) is not available yet, but a list may be available in the Release Notes (Developer Only).
For the Developer Preview: Registered Developers can access
InstallableMachines.plist
inInstallESD.dmg
for a full list of officially supported Mac board-ids.It may be possible to install on some unsupported hardware through modifying firmware, the installer, or other methods.