WinMux

A powerful sidebar-first window manager for macOS.

Highlights:

Projects

Projects are collection of workspaces. Think of it like a parent/child hierarchy, you can switch between projects. Each project has its own set of workspaces.

Sidebar

The sidebar is a more interactively-performant and useful alternative to Sketchybar and traditional workspace menu bar dropdowns for most everyday tasks. It provides better visibility into spaces and spatial awareness on the desktop.

You can drag windows in and out of the sidebar from and to the current workspace. You can rearrange windows across all spaces using the sidebar, including tab groups.

By default, the sidebar rests as a compact rail and expands when hovered. To hide the rail completely until the pointer reaches the left display edge, enable auto-hide. On macOS 26 and newer, native Liquid Glass is enabled by default and can be replaced with the material-blur fallback independently.

Window and sidebar spacing

The [gaps] settings control the visible borders around tiled windows. inner.horizontal and inner.vertical set the space between neighboring windows. The outer gaps set the space at each display edge; when the sidebar is enabled, outer.left is the space between the sidebar and the tiled windows. Any of these values can be reduced or set to zero independently.

Tab groups

Tab groups allow you to have many windows occupy the same footprint, similar to Yabai stacks but with browser-like tab behavior. This is useful when you want to have multiple pieces of reference information next to an editor, multiple tabs in different browser profiles, or, when you simply want multiple fullscreen views without the additional friction and overhead of creating a new workspace.

Unlike stack-only layouts, WinMux tab groups behave more intuitively like you would expect tabs to in browsers, and don't need a keyboard shortcut to activate. You can drag tabs from tab groups into another window's intent zone, or in between workspaces. You can also rearrange tab order within a tab group, and navigate through them with relative and absolute keybindings.