I'm used to iTerm2 (or Terminal.app for this case) on OS X. But I want to move to use tmux (or screen, but the problem is similar to both apps).
So my idea is to have a single iTerm tab with a tmux session opened with multiple tabs. To do the transition I have a basic feature I need to configure on tmux: switch the the tab 'n' by using cmd + n (like Firefox, Chrome, iTerm2 itself, etc)
However I can't find a way of mapping the cmd key on the mac keyboard. I first tried to implement cmd as a prefix key, with no success. I've tried setting
set-option -g prefix M-a (hoping for Meta-a)
set-option -g prefix ^a (hoping for ^ to work)
but nothing works. Is this possible? I don't really need to bind the prefix to cmd, but I want to be able to change tmux tabs with cmd+n.