Apple, in their infinite wisdom, has removed Telnet from Mac OS High Sierra 10.13
If you have been using MacWise version 16.0.6 or earlier with telnet and upgrade to High Sierra, you will not be able to connect to your host because the telnet command is missing from High Sierra.
The solution is to install Kermit.
MacWise version 16.0.7 or later includes a Kermit Installer.
Version 16.0.8 has the Kermit Installer built into MacWise.
Run MacWise and select Kermit Installer from the Help Menu.
Put a checkmark on Kermit under the Connection Menu in MacWise
You will now be able to open a Telnet Connection with MacWise.
