[jggimi]

How to upgrade:

1. Backup your system.
2. Download http://<your nearest mirror>/pub/OpenBSD/snapshots/amd64/bsd.rd and insert in your root directory
3. Reboot, and type "bsd.rd" at the "boot>" prompt
4. Type "u" to select [u]pgrade, and press the Enter key.
5. Follow the prompts to upgrade your OS.
6. Reboot, then run sysmerge(8) to complete your upgrade, pointing at http://<your nearest mirror>/pub/OpenBSD/snapshots/amd64/etc55.tgz and http://<your nearest mirror>/pub/OpenBSD/snapshots/amd64/xetc55.tgz.
7. Manually complete any changes not implemented by sysmerge, such as removal of old files.
8. Upgrade third party packages with pkg_add(1). You will find the "-u" option extremely helpful.
9. Manually build any ports which fail package upgrades due to being out of sync.