The standard procedure for creating a Secure Shell public/private key pair for UNIX-based systems (including Linux and macOS) follows. For information on additional options, see ssh-keygen.- Open your favourite terminal application- Run the key generation program:ssh-keygen -t rsaGenerating public/private rsa key pair.Enter file in which to save th...

Most system administration guides advise disabling password authentication in favour of key-based authentication. While this is a good base-line, given the poor choices in password selection, there are some occasions where password authentication is essential, but these should be managed with person-specific passwords, minimum password requirements...

You can download the current version of macOS via the Mac App Store, and older ones via these links:macOS CatalinamacOS MojavemacOS High SierramacOS SierraOS X El CapitanOS X YosemiteIf, however, you find that you're unable to download using Software Update (with an error "Update not found" or "The requested version of macOS is not a...