Configuration

A short and concise overview of options available with your current installation is available using man yabai or for the current development version as a → rendered document.

This wiki page aims to explain every configuration option in detail.

Configuration file

The per–user yabai configuration file must be named .yabairc, must be in your home–directory and must be executable. It's just a shell script that's ran before yabai reads its configuration options.

# create empty configuration file and make it executable
touch ~/.yabairc
chmod +x ~/.yabairc

Tiling options

Layout

Layout defines whether windows are tiled ("managed", "bsp") by yabai or left alone ("float"). This setting can be defined on a per–space basis.

# bsp or float (default: bsp)
yabai -m config layout bsp

# Override default layout for space 2 only
yabai -m config --space 2 layout float

By default, new windows become the right or bottom split when tiled, which can be changed to left or top.

# New window spawns to the left if vertical split, or top if horizontal split
yabai -m config window_placement first_child

# New window spawns to the right if vertical split, or bottom if horizontal split
yabai -m config window_placement second_child

Padding and gaps

When tiling windows, yabai can maintain gaps between windows and padding towards menu bar, dock and screen edges. This setting can be defined on a per–space basis.

# Set all padding and gaps to 20pt (default: 0)
yabai -m config top_padding    20
yabai -m config bottom_padding 20
yabai -m config left_padding   20
yabai -m config right_padding  20
yabai -m config window_gap     20

# Override gaps for space 2 only
yabai -m config --space 2 window_gap 0

Split ratios

Auto balance makes it so all windows always occupy the same space, independent of how deeply nested they are in the window tree. When a new window is inserted or a window is removed, the split ratios will be automatically adjusted.

# on or off (default: off)
yabai -m config auto_balance off

If auto balance is disabled, the split ratio defines how much space each window occupies after a new split is created. A value of 0.5 means that both old and new window occupy the same space; a value of 0.2 means that the old window occupies 20% of the available space and the new window occupies 80% of the available space. New windows are inserted at the right or bottom side. The ratio needs to be between 0 and 1.

# Floating point value between 0 and 1 (default: 0.5)
yabai -m config split_ratio 0.5

Mouse support

When you drag a tiled window onto another, yabai swaps their positions in the window tree. If you resize a tiled window, yabai will adjust splits to fit automatically.

Additionally, yabai can enable you to move and resize windows by clicking anywhere on them while holding a modifier key.

# set mouse interaction modifier key (default: fn)
yabai -m config mouse_modifier fn

# set modifier + left-click drag to resize window (default: move)
yabai -m config mouse_action1 move

# set modifier + right-click drag to resize window (default: resize)
yabai -m config mouse_action2 resize

With focus follows mouse, you can also focus windows without having to click on them. This can be set to either autofocus (window gets focused, but not raised) or autoraise (window gets raised as if it was clicked on). Focus follows mouse is disabled while holding the mouse modifier key so that you can access the menu bar easily.

# set focus follows mouse mode (default: off, options: off, autoraise, autofocus)
yabai -m config focus_follows_mouse autoraise

Mouse follows focus makes it so that when yabai focuses another window (e.g. through a focus command), the mouse cursor gets moved to the center of the focused window.

# set mouse follows focus mode (default: off)
yabai -m config mouse_follows_focus on

Window modifications

yabai allows modifying the way macOS presents windows.

# floating windows are always on top (default: off)
yabai -m config window_topmost on

# modify window shadows (default: on, options: on, off, float)
# example: show shadows only for floating windows
yabai -m config window_shadow float

# window opacity (default: off)
# example: render all unfocused windows with 90% opacity
yabai -m config window_opacity on
yabai -m config active_window_opacity 1.0
yabai -m config normal_window_opacity 0.9

# window border (default: off)
# - width has unit 1pt
# - colors for borders are in the format AARRGGBB (alpha, red, green, blue) 
#    as a hexadecimal value
# - active means focused window, normal means unfocused window, 
#    insert means selected window
yabai -m config window_border on
yabai -m config window_border_width 4
yabai -m config active_window_border_color 0xff775759
yabai -m config normal_window_border_color 0xff505050
yabai -m config insert_window_border_color 0xffd75f5f

Status bar

yabai ships with support for a simple status bar. Please note that feature requests for the status bar are unlikely to be fulfilled as it is supposed to be simple, and third-party tools like → Übersicht should be used for more complex status bars.

The → example configuration comes with an example configuration for the status bar, which should be fairly self-explanatory.