1. Mac Terminal Serial Emulator Screen Resource Busy Mode
2. Mac Terminal Serial Emulator Screen Resource Busy Software
3. Best Terminal Emulator Mac
4. Mac Terminal Serial Emulator Screen Resource Busy App
5. Mac Terminal Serial Emulator Screen Resource Busy Number

The terminal.app is relatively a great terminal emulator. Since it comes as standard with MacOS, it negates the need to download or install a separate one. For those who are looking for a great terminal, this it. In addition, it uses the least amount of resources compared with the other terminal emulators.

I've been using ZTerm and various terminal emulation software on the Mac for a while.

• Open Mac's Terminal app and run the following command to find Serial Port info. Ls /dev/cu. The response looks like: /dev/cu.usbmodem6A68DE4F34311. Enter your actual response within the next command, to start the terminal emulator. Screen /dev/cu.usbmodem6A68DE4F00,cs8,-parenb,-cstopb That will open the Screen terminal.
• ZOC is a terminal emulator via SSH/Telnet/RS232/Console for Windows 10 and MacOS. Find out more about the product or download it for a free 30 days trial. What is a terminal emulator? Today terminal emulators running on Windows and macOS simulate the terminals and allow you to send and receive information from a central computer.

Most have been a bit clunky, so I've reverted back to screen.
Came across an issue with it not connecting properly using my Keyspan USB to Serial adapter.
When I run the command:

Mac Terminal Serial Emulator Screen Resource Busy Mode

screen /dev/tty.USA19Hfa14P1.1
I get the following error:
Cannot open line 'dev/tty.USA19Hfa14P1.1' for R/W. Resource busy.
Sorry, could not find a PTY.
After some digging around turns out that when I last used screen, I didn't exit out of it properly.
Out of doing a: ps -f

Mac Terminal Serial Emulator Screen Resource Busy Software

ps -f
UID PID PPID C STIME TTY TIME CMD
501 666 1 0 0:00.00 tty.KeySerial1 0:00.00 SCREEN /dev/tty.USA19Hfa14P1.1
501 670 669 0 0:00.01 ttys000 0:00.02 -bash
I killed the process:
kill 666

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Mac Terminal Serial Emulator Screen Resource Busy App

Tried to use screen again and it worked this time around.

Mac Terminal Serial Emulator Screen Resource Busy Number

This is a reminder, more to myself, that you should always exit screen using the CONTROL-A followed by the CONTROL-.