GridSnap is an open-source alternative to Divvy for macOS. Press a shortcut, a grid appears, and you drag across the cells you want. The window then snaps to that region. Any region can be saved as a preset and assigned its own global shortcut, turning a multi-cell layout into a single keystroke. A Full screen preset on ⌃⌥F is built in, and the grid shows a live preview: the window follows your drag and returns to its original position if you cancel.
The grid size and the gap between snapped windows are configurable. You can snap either the focused window or the one under the cursor, and the tool works across multiple displays. The grid appears on the display under the cursor, so moving the mouse to another monitor before triggering it moves the window there. GridSnap runs as a menu bar app with no Dock icon, can launch at login, and makes no network requests, collects no analytics and requires no account. Undo for the last snap is available on ⌃⌥Z, and pressing it again redoes the action.
GridSnap requires macOS 14 or later and was tested on macOS 26. It runs on both Apple Silicon and Intel Macs. It can be installed with Homebrew using brew install --cask konieczkow/tap/gridsnap, or by downloading the latest release zip. On first launch it asks for Accessibility permission, which it needs to move other apps' windows. The permission takes effect without a relaunch.
The main limitations are that full-screen windows ignore snapping, and some apps enforce a minimum window size, so they may overlap neighbouring cells. The project is released under the MIT License.
Source: Hacker News · Summarized by HeadlinesBriefing