macOS includes full screen, Split View, Mission Control, Spaces, Stage Manager and, in recent versions, edge tiling. These are free and need no installation. Casement adds drag-to-layout snapping with more zones, an Option-Tab window switcher, Dock window lists, hover to focus and display control. Many people use the built-in tools first and add Casement when they hit limits.
What macOS gives you
| Tool | What it does | Limit |
|---|---|---|
| Full screen and Split View | Fill the screen or share it between two apps | Takes over the display; two panes |
| Mission Control and Spaces | Overview of windows; separate desktops | Overview, not arrangement |
| Stage Manager | Keeps one window large and others at the side | A different model; not for everyone |
| Edge tiling (recent versions) | Snap to halves and quarters | Fewer layouts, differs between versions |
| Command-Tab and Command-` | Switch apps; switch windows of one app | Not a list of every window |
What Casement adds
- Layouts beyond halves: thirds, one large plus two stacked, four-way grid, and extra columns and a six-window grid on large monitors.
- Option-Tab: every open window across all apps, minimised ones included.
- Dock window lists on hover and pinned items.
- Hover to focus without raising the window.
- Dock pinned to one display, and the ability to turn a display off.
- Chrome profile Dock icons (paid).
Using the two together
Casement does not replace Spaces or Mission Control; they work well together. If macOS tiling and Casement both react when you drag to an edge, turn one off. A common pattern is Spaces for tasks, Casement for arranging windows within a Space.
When the built-in tools are enough
If you use one or two windows at a time, or work mainly full screen, you may not need anything extra. Try the built-in tools for a week before adding software; the guide maximise a window without full screen may be all you need.
Questions to ask yourself
- Do I use many windows at once?
- Do I miss Windows-style snapping and Alt-Tab?
- Do I have several monitors?
- Do I use several Chrome profiles?
A trial plan before you decide
- Spend a week using only the built-in tools: Spaces for tasks, Command-` for windows of one app, and the tiling options in your macOS version.
- Write down each time you wish you could do something faster.
- If the list is short, stay with the built-in tools.
- If it is long, try Casement's free features for a week and compare.
- Add the paid Chrome profile feature only if you use several profiles.
macOS features differ by version; check Apple's documentation for your release.
Try Casement
Casement is a menu-bar app for Mac that puts each Chrome profile in the Dock as its own icon and adds snap layouts, hover-to-focus, a window switcher, Dock window lists, a drop shelf and display controls..