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This will show you how the time, how many hours or days of uptime, number of users, and CPU load averages. Mac OS X home computer / laptop Go to the spotlight icon in the upper right of your desktop In the search box, type terminal A menu choice for the terminal. (OS X bases a lot of their inner working on BSD) You will have to see what the device gets named by listing out /dev. The Terminal command we’ll be using is a simple, one-word command: uptime. Though, I do have FreeBSD on an old Dell workstation for this with dedicated RS-232 ports and my devices are /dev/cuca0 and /dev/cuca2. I currently don't have one attached to my Mac so I can't show you an exact name. What you would then do is connect to the console by issuing the command: $ screen /dev/cu
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What those instructions are telling you is to use an RS-232 connection to talk to the router. It just depends on the software that you use The instructions you got fit pretty much all OSes (Windows, macOS, Linux). I don't know if I am a "serious Mac user" but I do use my Mac "seriously".
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