For those with Macs that keep getting the Sorry, could not find a PTY error:
Open up Network Settings and delete any Duets that you may see. Press Apply. Try the screen /dev/tty.usbmodemXXXX 115200 command again.
Once they have, you'll be able to view a graph of their reputation gained over time.
Here's a preview of what the graph will look like:
No reputation gained yet.