What is a Window Manager on Mac?

A Mac window manager is an app that snaps, tiles, and resizes windows with keyboard shortcuts — replacing manual dragging so you can arrange apps into halves, quarters, or full-screen grids instantly.

Install a free, open-source window manager:

brew install --cask rectangle

Why people install one

macOS has basic window tiling (hold the green button) but no real keyboard-driven snapping or persistent grid layouts. A window manager adds shortcuts like "left half", "top-right quarter", or "maximize" and, for tiling managers, automatically arranges every window so none overlap — a big productivity win on large or multiple displays.

Snapping vs. tiling

Snapping managers (Rectangle, Magnet, Loop) move the focused window to a region you trigger. Tiling managers (Amethyst, yabai) automatically lay out all windows in a non-overlapping grid and are popular with keyboard-first power users. Many of the best options are free and open source and install in one command.

Frequently Asked Questions

What is the best free window manager for Mac?

Rectangle is the most popular free, open-source window snapper; Amethyst and yabai are free tiling managers for keyboard-first users.

Does macOS have a built-in window manager?

macOS has basic window tiling via the green traffic-light button, but a dedicated app adds keyboard shortcuts, grid layouts, and automatic tiling.

All Mac & Homebrew terms