Upgrading FreeBSD 15.0-RELEASE to 15.1-RELEASE: The Official Paths

FreeBSD 15.1-RELEASE was announced on June 16, 2026. If you’re running 15.0-RELEASE, you have a well-defined upgrade path - but the exact steps depend on how your base system is managed. The first question isn’t “which tool should I use?” but “how is my base system installed?” This article follows the official 15.1-RELEASE upgrading instructions, explains the pre-upgrade detection, walks through both supported procedures (distribution-set and packaged-base), and covers the boot-loader update step included in the official procedure. Support timeline: 15.1-RELEASE is supported until March 31, 2027. 15.0-RELEASE reaches EOL on September 30, 2026. The 15.x series as a whole is supported until December 31, 2029. Table of Contents Table of Contents Before You Begin: The Universal Checklist Path A: Distribution-Set Systems (freebsd-update) Step 1: Apply Pending Patches First Step 2: Upgrade to 15.1-RELEASE Step 3: Install the Kernel and Reboot Step 4: Finish the Userland Update Step 5:…