Homebrew has dropped support for macOS 10.12 with their 2.1.13 release. For Dashing’s 4th patch release I have pinned homebrew on our macOS build hosts to 2.1.12 and pinned the homebrew-core formula repository to the commit id cf7f155665921a3cda9a48838547f8d45d6a62c4 which is the last commit before a CMake point release drops its binary bottle for Sierra.
Once I’ve got tests completed I’ll publish the full list of installed homebrew package versions on our macOS Sierra hosts and update the Dashing instructions for macOS.
This will likely be the Dashing last patch release to include macOS binaries.