New mac - installed tmux but can't use mouse in for pane switching I have the required setw / setg setting for mouse in my .tmux.conf but they aren't working.

I've done tmux source-file .tmux.conf

I can use tmux and split windows with my remapped keys and other settings that I have such as remapping the power key ARE working.
Turned out I was using tmux with the basic mac terminal app.

It mostly worked but a few things didn't.  The mouse functionality is an example.

The answer was that I needed to download and use iterm2 as the actual terminal app to use tmux with.

Once I did this my tmux mouse settings worked fine with it.