This quickstart introduces macOS administrators to OpenBSD 7.7 by mapping familiar concepts to OpenBSD tooling and conventions. It highlights practical differences; it is not an exhaustive comparison nor a discussion of philosophy. The guide assumes OpenBSD is already installed and you have command-line access. Shells # On OpenBSD, the default shell for both root and regular users is the Korn shell, ksh(1) . On modern macOS systems, new user accounts default to zsh. OpenBSD’s ksh(1) impleme...