This build is being provided to you for testing and development purposes. Should you encounter any problems, please submit a bug report using the online Bug Reporter at bugreporter.apple.com. Please make sure to include "10.12 (16A294a)” in the bug title and description. This information will ensure that your bug is processed quickly.
The macOS 10.12 Developer Preview supports the following Macs:
• MacBook, iMac: Late 2009 or newer
• MacBook Air, MacBook Pro, Mac mini, Mac Pro: 2010 or newer
You can learn all about what's new in macOS Sierra by clicking here.
Developers can get an App Store Redemption Code for Sierra at the link below. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.