Serial 2.0.1 Serial is a modern terminal emulator designed to make working with servers, network equipment, and embedded hardware easier for engineers and system administrators. For system administrators, Serial supports the all-important break sequence. Knowing the serial port, you can just type screen portname datarate to show the serial data on the screen. In my case, it was: screen /dev/tty.PL23D 9600. To quit the screen app, type control-A, then control. I don’t think that this is very complete, but it worked for me and might help you to get your USB serial working. There are a few software apps out there, but I find it much simpler to simply use the terminal application “screen”. This works well particularly if you have an RS-232 serial to USB converter. The first thing to do is determine which device you want to connect to. Ls /dev/tty. Once you’ve determined which device you would like to use, you can execute the SCREEN command to start the serial terminal session on your. Establishing Serial Communications with your Board You can send serial commands to your board via Terminal or PuTTY using the edge micro-type B USB port. You can use these commands to flash the OS image, configure Wi-Fi settings, or identify the IP address.
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Terminal User GuideMac Os X Serial Terminal Appointment
Each window in Terminal represents an instance of a shell process. The window contains a prompt that indicates you can enter a command. The prompt you see depends on your Terminal and shell preferences, but it often includes the name of the host you’re logged in to, your current working folder, your user name, and a prompt symbol. For example, if a user named michael is using the default zsh shell, the prompt appears as:
This indicates that the user named michael is logged in to a computer named MacBook-Pro, and the current folder is his home folder, indicated by the tilde (~).
![]() Open Terminal
On your Mac, do one of the following:
Quit Terminal
Quit a shell session
This ensures that commands actively running in the shell are closed. If anything’s still in progress, a dialog appears.
If you want to change the shell exit behavior, see Change Profiles Shell preferences.
See alsoApple Support article: Use zsh as the default shell on your MacExecute commands and run tools in Terminal on MacChange the default shell in Terminal on MacOpen new Terminal windows and tabs on MacUse profiles to change the look of Terminal windows on MacApple Developer website: Command Line Primer
You might want the model name or serial number of your Mac when checking warranty coverage, searching for specifications or other information about your model, creating a home inventory, and more. Identifying your Mac model is also important when selling or giving away your Mac or learning whether it's compatible with the latest operating system or other software or hardware.
Using Terminal MacUse About This Mac
From the Apple menu in the corner of your screen, choose About This Mac. You'll see an overview of your Mac, including its model name and serial number.
If you see a window like this, double-click the version number beneath “OS X” to show the serial number: Use System Information
The System Information app also shows your Mac model and serial number. Open the app, then select Hardware on the left side of the System Information window. The model name and serial number appear on the right:
If your Mac doesn't finish starting up
If you can't use the solutions above because your Mac doesn't finish starting up:
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If you still need help, contact an Apple Store or Apple Authorized Service Provider.
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December 2020
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