How to Snap Windows on Mac Without an Extra App

How to snap windows on a Mac without extra apps: drag a window to a screen edge, use the Window menu to tile, and set the option in Desktop and Dock.

1. Check the tiling setting is on. Open System Settings, choose Desktop and Dock, and scroll to the Windows section. Confirm that the option for dragging windows to screen edges to tile is switched on. A separate option controls whether tiled windows keep a margin between them.
2. Drag a window to a screen edge. Grab a window by its title bar and push it against the left or right edge of the display. A translucent outline shows where it will land. Release the pointer and the window fills that half. Drag into a corner for a quarter instead.
3. Use the Window menu instead. With a window focused, open the Window menu in the menu bar and look for Move and Resize. It lists Left, Right, Top, Bottom, the four quadrants, Fill and Center. Choose one and the window moves without any dragging at all.
4. Arrange two windows at once. The Window menu also offers Fill and Arrange, which places the current window alongside others in a preset layout. Use it when you want two or three windows positioned together rather than moving each one into place separately.
5. Undo a tile and get the size back. Drag the tiled window away from the edge by its title bar and it returns to its previous size. The Window menu also carries a Return to Previous Size item under Move and Resize. Tiled windows are ordinary windows, not a special mode.