zsh: command not found: telnet

Alternatively, you can use the nc (or netcat) command in Terminal, as a replacement for telnet.

Hi,

telnet is no longer available since High Sierra, so if you need telnet, you need to install telnet by yourself since telnet is not secured.

Install Homebrew: type

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"


Install telenet: type

brew install telnet