GitHub for Mac 1.2, known as Snow Octocat, introduces significant improvements in stability and speed, with tests showing it to be considerably faster and less prone to crashes than its predecessor. This update features a complete redesign of the branch browser, allowing users to navigate between branches more efficiently using keyboard shortcuts and create new branches directly from the popover by typing the desired branch name. Developed with contributions from an expanded team, this release is part of a broader plan for further enhancements to the Mac app throughout the year.