My tmux config from a macOS machine

.tmux.conf

# Change the prefix to C-t.
unbind C-b
set -g prefix C-t

# Default shell.
set-option -g default-shell /bin/zsh
# set -g default-shell $SHELL 
# Make clipboard copy/paste work.
# set -g default-command "reattach-to-user-namespace -l ${SHELL}"

# vi-like key bindings.
set-window-option -g mode-keys vi

bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

bind v split-window -h -c "#{pane_current_path}"
bind s split-window -v -c "#{pane_current_path}"
bind c copy-mode
bind-key C-t select-pane -t :.+

bind w new-window

# Resize panes with mouse.
# Old options:
# set -g mode-mouse on
# set -g mouse-resize-pane on
# Requires iTerm or additional tweaking to Terminal:
# http://www.davidverhasselt.com/enable-mouse-support-in-tmux-on-os-x/
# set-option -g mouse on

# Resize panes using prefix with hjkl.
bind H resize-pane -L 5
bind J resize-pane -D 5
bind K resize-pane -U 5
bind L resize-pane -R 5

# Move panes between windows.
# <prefix> [session]:window
bind-key F command-prompt -p "join pane from:"  "join-pane -s '%%'"
bind-key T command-prompt -p "send pane to:"  "join-pane -t '%%'" 

# Emulate visual selection.  'v' starts a selection and 'y' finishes it.
# bind-key -t vi-copy v begin-selection
bind-key -T copy-mode-vi v send-keys -X begin-selection
# bind-key -t vi-copy y copy-selection -x
bind-key -T copy-mode-vi y send-keys -X copy-selection
# bind-key -t vi-copy Y copy-pipe 'xclip -in -selection clipboard'
# This is for new tmux and is macOS-specific.
bind-key -T copy-mode-vi Y send-keys -X copy-pipe-and-cancel 'reattach-to-user-namespace pbcopy'



# Paste.
unbind p
bind p paste-buffer
# bind P run "xclip -o | tmux load-buffer - ; tmux paste-buffer"
# macOS-specific.
bind P run "pbpaste | tmux load-buffer - ; tmux paste-buffer"

# More history.
set-option -g history-limit 10000

# Reload tmux config.
bind-key r source-file ~/.tmux.conf

# Allow to move using Shift+arrow or Ctrl+arrow in Vim cmdline mode.
set-window-option -g xterm-keys on