As others have suggested, use zsh autosuggestions, personally I like to use oh-my-zsh as the framework for adding zsh plugins, but I don't think its required. A

As others have suggested, use zsh autosuggestions, personally I like to use oh-my-zsh as the framework for adding zsh plugins, but I don't think its required. As for the terminal emulator, iTerm is stellar, but the terminal emulator does not handle things such as autosuggestions, that's all up to the shell.