I waited a little while to upgrade to High Sierra until I knew what I might lose with the new system. One thing that went away was the ability to use telnet and ftp from Terminal.app.
Others have encountered and fixed this issue prior to me. Here’s the simple fix:
- Open “Terminal.app” on your Mac
- Type the following and then press enter:
brew install telnet tnftp
You should get a response like this:
==> Downloading https://homebrew.bintray.com/bottles/tnftp-20070806.high_sierra.
######################################################################## 100.0%
==> Pouring tnftp-20070806.high_sierra.bottle.tar.gz
? /usr/local/Cellar/tnftp/20070806: 9 files, 262.9KB
If you receive an error message, you may need to consider installing XCode and “brew” for macOS High Sierra and repeat the instructions in this post.
** UPDATE ** These instructions work with macOS Catalina too.