iterm2 opt with arrow - simeonlam/knowledge GitHub Wiki

https://apple.stackexchange.com/questions/154292/iterm-going-one-word-backwards-and-forwards

Killing a fly with a cannon:

Go to Preferences... > Profiles > Keys (not Preferences... > Keys) Press Presets... Select Natural Text Editing Then, you can move a word backwards using Option ⌥ + ← and a word forwards using Option ⌥ + →, move to the start of the line using fn + ← and to the end of the line with fn + →. Also you can delete a word backwards using Option ⌥ + ⌫, delete the whole line using Command ⌘ + ⌫.

If the preset doesn't appear, reinstall iTerm2. If you installed it using Homebrew+Cask:

brew cask reinstall iterm2