Apple added window tiling to macOS in Sequoia and it was a relief: drag to an edge, or press a shortcut, and the window takes half the screen. Then you notice what is missing. There is no gap between windows unless you accept Apple's one fixed margin. There are no thirds. There is no way to keep a snapped window from sliding under a menu bar overlay or a custom dock. And the drag gesture needs you to hit the edge, which on a large display is a long trip. Window Snap is Droppy's droplet for the rest of it.
Two ways to snap
Hold the action key and drag. Snap zones appear as you move, with a fluid preview of where the window will land. Let go and it snaps, with your padding applied. Turn on the no-key option and dragging from a title bar corner snaps without any modifier at all.
- Start dragging a window with the action key held.
- Move toward a zone: left, right, a quarter, a third.
- Release. The window animates into place.
Record a chord per position. Left half, right half, top and bottom, the four quarters, thirds, maximise, restore. Record only the ones you will use. Shortcuts live in Droppy's Shortcuts panel with conflict detection as you press.
- Open Window Snap in Settings.
- Record shortcuts for the positions you want.
- Press one with any window in front.
Or put the positions on a ring. The Ring droplet has a Window Snap preset: one shortcut, and the halves, quarters, thirds and maximise are buttons you flick toward. No chords to remember.
Most people use the drag for one-off placement and a couple of chords for the layout they return to.
Padding, and why it matters
Two windows butted edge to edge look like one broken window. A few points of space between them and each reads as its own thing. Window Snap has an adjustable padding value that applies to every snap, and it applies to the screen edges too, so a maximised window can float slightly inside the display instead of pressing against the bezel. It is a small setting that changes how a tiled desktop feels.
Restore matters as much as snap. A window you snapped to the left half should be able to go back to the size and place it had before, and Window Snap keeps that so a restore shortcut, or dragging the window out of its zone, puts it back rather than leaving it stuck at half width. Maximise follows the same rule: it fills the display inside your padding, and restore returns the previous frame.
Reserved edges
macOS knows about its own Dock and menu bar. It does not know about a third-party dock, a menu bar overlay, a floating widget or a bar at the bottom of the screen from another app. Snap a window to the bottom half and it slides under whatever lives there. Window Snap lets you reserve space on each screen edge, per display, so snapped windows stop short of it. Set an edge to zero to disable it. If you keep a Droppy shelf open on one display and a dock on another, the reservations can differ per screen.
| macOS tiling | Window Snap | |
|---|---|---|
| Halves and quarters | Yes | Yes |
| Thirds | No | Yes |
| Padding | One fixed margin, on or off | Adjustable |
| Drag to snap | Screen edges only | Zones with a live preview, action key or title bar corner |
| Reserved edges | No | Per display |
| Multi-display | Yes | Yes, with per-display reservations |
| Restore | Drag out | Shortcut or drag out |
External displays and the notch
On a MacBook with an external display, the layouts you want on each screen differ. The laptop screen is small, so halves are the practical limit. The external display is where thirds earn their place: a chat on the left third, the editor across the right two. Window Snap treats each display on its own, and the reserved edges are per display, so the notch-height strip at the top of the laptop screen can be reserved while the external monitor uses the full height. The external display guide goes through the rest of that setup.
What it does not try to do
Window Snap is not an automatic tiling manager. It will not rearrange every window when you open a new one, and it does not have layouts that remember which app goes where. Those are good tools for people who want them, and they come with a learning curve and a background process that is always thinking. Window Snap is the manual middle: a snap when you ask for one, and nothing running when you do not. That is consistent with the rest of how the Mac manages windows, where Mission Control and Spaces do the grouping and tiling does the placement.