Mac and tmux Config

Some configurations I always struggle with when things are misconfigured and suddenly not working as expected (e.g. when installing a new Mac or after a Mac upgrade).

Mac

Jump word in iTerm2 with Option + Key

I want to jump words with Option + ← and Option + →, respectively. Configure iTerm like this:

1. open iTerm2 Settings with CMD + ,
2. navigate to Profiles -> Keys -> General
3. Make sure Left Option key is set to Esc+

4. add the following Keyboard Shortcuts:

   Keyboard Shortcut	Action	Escape Sequence (Esc+)
   option + Left (⌥←)	Send Escape Sequence	b
   option + Right (⌥→)	Send Escape Sequence	f

tmux

Resize Pane Shortcut

I want to resize tmux panes with the Shortcut [tmux Shortcut - Ctrl-b] + Ctrl + ←, [tmux Shortcut - Ctrl-b] + Ctrl + →, [tmux Shortcut - Ctrl-b] + Ctrl + ↑ and [tmux Shortcut - Ctrl-b] + Ctrl + ↓.

By default, this should be configured in the tmux config already. You can verify it with

tmux list-keys | grep resize

Which should give you

bind-key -r -T prefix       C-Up                   resize-pane -U
bind-key -r -T prefix       C-Down                 resize-pane -D
bind-key -r -T prefix       C-Left                 resize-pane -L
bind-key -r -T prefix       C-Right                resize-pane -R

If they don't exist, add it to your ~/.tmux.conf and source it with tmux source-file ~/.tmux.conf.

To make it work in iTerm2, do the following:

1. open iTerm2 Settings with CMD + ,
2. navigate to Profiles -> Keys -> General
3. Make sure Left Option key is set to Esc+

4. Add the following keyboard shortcuts:

   Keyboard Shortcut	Action	Escape Sequence (Esc+)
   ⌃ + Left (^←)	Send Escape Sequence	[1;5D
   ⌃ + Right (^→)	Send Escape Sequence	[1;5C
   ⌃ + Up (^↑)	Send Escape Sequence	[1;5A
   ⌃ + Down (^↓)	Send Escape Sequence	[1;5B