AFAIK, you'll need to have at least `setw -g mode-keys vi` in your ~/.tmux.conf file to allow tmux to use vi keybindings in copy mode (`Ctrl+b ]`). Make sure to fully exit all tmux sessions and start a new session after making that change.
I have basically the same setup as you, and I think that's the only thing I've manually configured. I also run the oh-my-zsh tmux plugin, and iTerm2's tmux integration, which seemed to work out of the box for me.
I have basically the same setup as you, and I think that's the only thing I've manually configured. I also run the oh-my-zsh tmux plugin, and iTerm2's tmux integration, which seemed to work out of the box for me.