I have installed BYOBU via Brew and all the F keys work except for the F9 key which happens to be the key used to get to the menu. I have worked around this by editing the ~/.byobu/status files manually. It would be nice to get this working. Has anyone fixed this? I don't think it's a $TERM issue.
The Byobu guys have done some work porting it to OS X. I did a fresh install via Brew and it works like it does in linux. They eliminated the need to use the F9 key. That functionality can be achieved by running.