GridPin

Snap zones and movable window groups for Mac.

GridPin is a macOS window manager that does two things most window snappers don't combine. First, Windows-11-style snap zones: drop a window into a fractional grid — halves, thirds, quarters, weighted columns, or a PowerToys-style priority grid — that resolves correctly on a laptop panel or a 5K display. Second, window groups: multi-select several windows, move and nudge them as one, and pin the group while everything else reflows into the free space around it.

What it does

• Snap zones — resolution-independent fractional layouts, including priority and focus templates.
• Window groups — move a set of windows together and keep their arrangement.
• Arrange-around — pin a group and tile the remaining windows into the leftover space.
• Multi-monitor aware, with a global hotkey and a click-through zone overlay.