tmux homebrew C-B prefix not working on macosx

Question

I am new to tmux. I use screen for remote session. After reading a few tutorials online I am very surprise. So I want to give it a try as tmux is easier to use and more customizable for me as a developer.

I am on macosx sierra and install tmux via homebrew but after creating a session I used C-B prefix command for example C-B % to split but it did not work.

Can anyone tell me how to debug this or is there any setting for this to work?

ps: I also try a few combination cmd+b+% ,...

Seamstress

1.) Are you sure you're using the default prefix (^C-b)? You should be able to sniff out the current prefix by running the following in your terminal: tmux list-keys | grep send-prefix. 2.) You've used the character "B" (as opposed to "b") throughout your post. Are you actually pressing control shift+b? If so, that's likely your problem. – Niveous

I used no shift. C-B is what I saw in written in blogs. – Seamstress

after grepping the list-keys i got this: bind-key -T prefix C-b send-prefix is there anything wrong? – Seamstress

I'm not positive, but I think you may want to remove that -T flag from your .tmux.conf. (Also, since it appears to be relevant, you should probably add the contents of your .tmux.conf file to the question body.) – Niveous

I installed it from homebrew there is no .tmux.conf file in my home dir and brew. – Seamstress

For the sake of argument, try adding this to ~/.tmux.conf and seeing if ^C-a works. – Niveous