MacWise Version 16.0.7
It is compatible with Mac OS High Sierra.
Apple, in their infinite wisdom, has removed Telnet from Mac OS High Sierra 10.13
If you have been using MacWise 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.