[apenwarr]

Alas, the real “telnet” protocol has considerably more fanciness than nc. It’s just that the telnet cli command degrades into a simple line-oriented mode if it doesn’t see the telnetd init sequence.

[runjake]

True, but it handles 99% of the use cases of the people who lament the demise of telnet in macOS. :-)

For the rest: brew install telnet

[Brian_K_White]

macports please

[ithkuil]

For example window size negotiation