During its two-month development cycle, Docker 1.12.2 received a total of three Release Candidate (RC) builds, which brought numerous networking and runtime improvements, as well as multiple enhancements to the Swarm Mode feature introduced in the Docker 1.12 release. Besides the networking, runtime, and Swarm Mode changes, which you can view in detail if you read the changelog attached at the end of the article, Docker 1.12.2 adds stability improvements for the Docker Client under the new macOS Sierra 10.12 operating system from Apple.