Indicate the last login of users and ttys.
The interfaces in file <utmp.h> are all DEPRECATED and are only provided for compatibility with previous releases of macOS. See pututxline(3) and utmpx(5) for the supported interfaces.
Syntax last [-n] [-h host] [-t tty] [user ...] Key -n Limits the report to n lines. -h host Host names may be names or internet numbers. -t tty Specify the tty. Tty names may be given fully or abbreviated, for example, 'last -t 03' is equivalent to 'last -t tty03'.
Last will list the sessions of specified users, ttys, and hosts, in reverse time order. Each line of output contains the user name, the tty from which the session was conducted, any hostname, the start and stop times for the session, and the duration of the session.
If the session is still continuing or was cut short by a crash or shutdown, last will indicate this.
If multiple arguments are given, the information which applies to any of the arguments is printed, e.g., 'last root -t console' would list all of 'root's' sessions as well as all sessions on the console terminal.
If no users, hostnames or terminals are specified, last prints a record of all logins and logouts.
The pseudo-user reboot logs in at reboots of the system, thus 'last reboot' will give an indication of mean time between reboot.
If last is interrupted, it indicates to what date the search has progressed. If interrupted with a quit signal last indicates how far the search has progressed and then continues.
"Arithmetic is being able to count up to twenty without taking off your shoes" ~ Mickey Mouse
Related macOS commands:
log - Access system wide log messages.
sudo log show --style syslog --last 1d
sudo log show --style syslog --last 1h
login - log into the computer.
logout - Exit a login shell.