User Vivek Gite shows us how to update your FreeBSD operating system from version 11 to the latest 12. The walk-through will make sure all your packages are updated as well. See the link below for the full set of instructions.

The FreeBSD project announces the availability of FreeBSD 12.0-RELEASE. It is the first release of the stable/12 branch. The new version comes with updated software and features for a wild variety of architectures. The latest release provides performance improvements and better support for FreeBSD jails and more. One can benefit greatly using an upgraded version of FreeBSD.

Full tutorial: https://www.cyberciti.biz/open-source/freebsd-12-released-here-is-how-to-upgrade-freebsd/