I have done research on serial port communication using a macOS app a little bit ago but it seems like I will need to use a Command-line tool program. Is this correct? If I do go the Command-line tool route I will have to use cktool I believe. Will cktool allow me to use NSPersistentCloudKitContainer or similar command to allow a silent notification type fetch data system?

I've tried to use the SerialSample program on Apple's Developer site but haven't been able to get the data back that would receive in a terminal screen. It does connect to the usbmodem and at the correct baud rate but the data is incorrect. This is most likely an error in my usage so I will also listen to suggestions for that method if it's the only way to achieve my above goal.