How to Snap Windows on Mac in 2026: Split View and Tiling

To snap windows on a Mac, drag a window to the left or right edge of the screen and let go when the highlighted area appears, or press Fn-Control-Left Arrow or Fn-Control-Right Arrow. For a distraction-free split screen, hover over the green button in the window's corner and choose Full Screen > Left of Screen to start Split View.

Two windows that keep overlapping is a small, constant tax: you click the wrong one, lose your place, drag the corner again. macOS 27, which Apple released in September 2026, handles this without any extra app. This guide covers both built-in ways to put apps side by side, the shortcuts worth learning, the settings that make snapping behave, what to check when it stops working, and when a window manager app is still worth a few dollars.

Window tiling or Split View: which one do you want?

macOS has two separate features for a split screen. Window tiling snaps ordinary windows into halves, quarters or a full desktop while the Dock, menu bar and every other window stay where they are. Split View takes two apps full screen, side by side, in a new desktop space of their own, with nothing else on screen.

Tiling is the one I reach for almost every time, because I still want the Dock and a glance at other windows. Split View earns its place when I'm writing something long against a source document and want the rest of the Mac to disappear.

How to snap windows side by side on Mac

Snapping a window to half of the screen on a Mac takes one drag: pull the window by its title bar to the left or right edge, and macOS fills that half once you release. Apple's window tiling guide describes the full set of drop zones:

1. Drag the window by its title bar toward the left or right edge of the screen.
2. Wait for the highlighted area to appear where the window will land.
3. Release the mouse or trackpad. The window snaps into that half.
4. Drag a second window to the opposite edge to fill the other half.
5. For a quarter, drag a window to one of the four corners instead of an edge.
6. To fill the whole desktop, drag the window up to the menu bar.

Be careful with that last one. Dragging through the top edge, rather than stopping at the menu bar, opens Mission Control. The first week I used tiling I kept flinging windows into Mission Control by overshooting, until I turned that behavior off (the setting is covered below).

Snap with the Option key

Holding Option while you drag is a second way to tile. Apple's guide puts it as three steps: hold Option, drag the window toward the top, left, right or a corner, and release it in the highlighted area. Option-dragging is also the one to keep if you switch off edge snapping, as the settings section below explains.

Snap from the green button or the Window menu

If you'd rather click than drag, hover over the green button in the window's top-left corner. A menu of layouts appears: Fill & Arrange for tiling and Full Screen for Split View. The same choices sit in the menu bar under Window > Move & Resize. Hold Option while either menu is open to see more layouts, according to Apple.

Mac window snapping keyboard shortcuts

Most tiling positions on macOS 27 have a keyboard shortcut built on Fn-Control (Fn is the Globe key on newer Mac keyboards). Apple lists them on its tiling shortcuts page. These move the front window only:

Adding Shift arranges more than one window at once: the front window takes the first position and macOS fills the rest of the screen with your other windows.

The corner quarters (Top Left, Top Right and so on) and the plain Quarters layout have no shortcut listed, so use the green button for those. If you want one, you can give any menu command your own key in Keyboard settings; the Mac productivity tips post walks through that. Of all of these, Fn-Control-R is the one people forget: it undoes a snap and puts the window back exactly where it was.

How to use Split View on Mac

Split View puts two apps full screen side by side in their own space. You start it from the green button, then choose the second app on the other side. Apple's Split View guide gives these steps:

1. Click the first app's window so it's in front.
2. Hover over the green button in the window's top-left corner.
3. Choose Full Screen, then Left of Screen or Right of Screen. (In the menu bar, the same options are under Window > Full Screen Tile.)
4. On the other half of the screen, click the window of the second app you want.

macOS creates a new desktop space for the pair. To see the menu bar, push the pointer up against the screen's top edge; to see the Dock, move it to where the Dock usually sits. Many apps support Split View, but not every one: if an app can't go full screen, it won't offer the Full Screen options.

Resize, swap or replace a side

• Resize: drag the separator bar between the two apps. Double-click the bar to go back to the original sizes.
• Swap sides: drag a window by its title bar and toolbar to the other side.
• Replace one app: click its window, hover over the green button, choose Replace Tiled Window, then click the window you want instead. Click the desktop to keep the current one.

Turn a full-screen app into Split View

If one app is already full screen, you can pair it from Mission Control instead of starting over:

1. Press Control-Up Arrow, or swipe up with three or four fingers, to open Mission Control.
2. Drag a window from your desktop onto the full-screen app's thumbnail in the Spaces bar at the top.
3. Click the new Split View thumbnail to open it.

How to exit Split View on Mac

To leave Split View, click one of the windows, hover over the green button and choose Move Window to Desktop. The other app stays full screen in its own space; press Control-Up Arrow and click it in the Spaces bar to get back to it. Choosing Make Window Full Screen instead gives that one app the whole space. To hop between spaces without Mission Control, press Control-Left Arrow or Control-Right Arrow, or swipe left or right with three or four fingers, per Apple's Spaces guide.

Window tiling settings on Mac

All of the drag-to-snap behavior can be turned on or off in System Settings > Desktop & Dock, in the Windows section. Apple's tiling settings page lists four switches:

• Drag windows to left or right edge of screen to tile: the main snap-to-half behavior.
• Drag windows to menu bar to fill screen: the drag-up-to-fill move.
• Hold ⌥ key while dragging windows to tile: the Option-key shortcut.
• Tiled windows have margins: leaves a gap between tiled windows.

On my laptop I turn margins off. The gap looks tidy on a big monitor, but on a smaller screen it costs a sliver of every window for no real gain. Further down the same settings pane, in the Mission Control section, Drag windows to top of screen to enter Mission Control is the setting that ends the accidental trips into Mission Control mentioned above.

Split screen on an external display

Window tiling works on every connected display the same way: drag to that screen's edge or use the Fn-Control shortcuts while the window is on it. Split View needs one extra setting to work on displays other than the main one. Turn on Displays have separate Spaces in System Settings > Desktop & Dock, per Apple.

When I'm on an external monitor, I keep the laptop screen for one thing, usually my calendar or a chat app, and tile the big screen into a half and two quarters with Fn-Control-Option-Shift-Left Arrow. One shortcut, three windows placed.

Split screen layouts that work for real tasks

The shortcuts matter less than knowing which pairing you're setting up. A few I set up all the time:

• Writing against a source. When I draft a weekly update, the doc goes on the left half and last week's notes or the metrics sheet on the right. Split View is worth it here; hiding everything else keeps me from wandering off into email.
• A call plus notes. On a video call I tile the meeting window to one half and my notes to the other. If I share my screen, I share only the meeting app's window or the notes window, never the whole screen, so nobody sees the other half. The Zoom screen sharing guide covers sharing a single window.
• Inbox triage with the calendar open. Mail on the left, Calendar on the right, so I can answer "does Thursday work?" without switching apps.
• Comparing two versions. Two Finder windows or two documents in top and bottom halves (Fn-Control-Shift-Up Arrow) make long lines easier to compare than a left-and-right split.

Why window snapping isn't working on your Mac

Snapping usually fails for one of a handful of reasons: an older version of macOS, a setting that's off, a window that's already full screen, or an app that can't be resized. Work down this list:

1. Check your macOS version. Built-in window tiling needs macOS Sequoia 15 or later, according to Apple. On an older version, only Split View is there. Choose Apple menu > About This Mac to see which one you have.
2. Check the settings. Open System Settings > Desktop & Dock and make sure the tiling switches under Windows are on.
3. Leave full screen first. A window in full screen or Split View can't be tiled on the desktop. Press Control-Command-F to leave full screen in apps that support it, per Apple's keyboard shortcuts page.
4. Look at the app. Some apps have a fixed window size or don't support full screen, so they won't snap or join Split View. Try the same move in Finder; if Finder snaps, the app is the problem.
5. Check the shortcut keys. The tiling shortcuts need Fn (Globe) as well as Control. Another app's shortcut can also grab the same keys; quit recently installed utilities and try again.
6. Split View on a second display. If it only works on the main screen, turn on Displays have separate Spaces.
7. Still stuck? Restart the Mac. It's dull advice, but it clears a surprising number of window glitches.

Do you still need a window manager app?

If your Mac runs Sequoia or anything newer, the built-in tiling is enough for most people. A third-party window manager makes sense when you want custom grids (thirds, for example, on an ultrawide monitor), your own shortcuts for every position, or the same keys on an older Mac.

I'd try the built-in shortcuts for a week before adding anything. If you find yourself wishing for a layout macOS doesn't have, that's the moment to install Rectangle. There's also Stage Manager, which is a different idea entirely: it keeps one app or group in the middle and parks recent apps along the left edge. Apple's Stage Manager guide explains it; it suits people who switch between tasks more than people who need two windows visible at once.