I just upgraded my computer to 10.14.3 from 10.13.6, I had a few moments where the printer didn't want to connect but after cycling the printer and restarting the app I'm printing again. Not sure if I had extensions loaded that were from my previous setup, I don't remember installing anything specific just for the printer.
I checked my log right after the computer was upgraded and found the following actions attributed to MatterControl:
default 17:37:11.559224 -0600 MatterControlMac LaunchServices observer: Uninstalled plugins
default 17:37:11.608893 -0600 MatterControlMac Failed to find plugin with UUID
default 17:37:11.611080 -0600 MatterControlMac LaunchServices observer: Uninstalled plugins
default 17:37:11.635755 -0600 MatterControlMac LaunchServices observer: Installed plugins
Not sure if that will ring a bell with anyone familiar with that background processes.
I've had the shutdown/crash issue with version 2.0 but I found restarting the computer between prints trends to eliminate the crash. I'm monitoring other threads on this forum to see if there is a fix for that.
Computer: Mac Pro (late 2013) w/ 512GB SSD, 64GB RAM
Printer: SeeMeCNC RoStock MAX 2.0
MatterControl Version: 188.8.131.5223