This is something I actually did for a So you can send a message through the Terminal using a single-line AppleScript command. If you put that into a shell script file, you can then schedule it using the <strong>crontab</strong>. Unfortunately, you have to edit the crontab using the old <strong>vi</strong> editor, though I seem to remember there may be an easier way. Anyway, I used this to send a message at a schedule time recently. I don't think it is very reliable for important things. I'll bet your Mac has to be awake and it probably pays to test it a few times before using it for real as your permissions may be set differently than mine.
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