How many keychains does your Mac have? The answer is surprisingly elusive, and neither Keychain Access nor the security command tell the truth.
securityd
Overview of the features of all available tools for working with keychains – including one running on Windows!
Why doesn’t High Sierra record the opening of keychains in the log, in the way that Sierra does? Has Apple abandoned the goals of its new unified log?
A detailed examination of what happens during the first few minutes after starting your Mac up. Vital for anyone trying to diagnose problems in that period.
Signposts from Sierra 10.12.6 recording key steps when logging in, out, and fast user switching. And a fascinating process which serialises its log entries.
The Eclectic Light Company 