10.12.1 beta 1 links
firmware update: http://swcdn.apple.com/content/downloads/49/10/031-82179/ndgr6d3ojw342xpo8hjawnfljsqpovic0b/FirmwareUpdate.pkg
full bundle update: http://swcdn.apple.com/content/downloads/49/10/031-82179/ndgr6d3ojw342xpo8hjawnfljsqpovic0b/FullBundleUpdate.pkg
And to use the packages, it depends which partition you install from.
To install from same partition
1. Start update via mac app store
2. Move packages into /Library/Updates/031-82179
3. Restart.
4. Go to updates tab in mac app store and click update
To install from different partition
Just run the packages individually, carefully selecting the Sierra partition on which to install.