Rectangle and Stage Manager: Making Them Work Together (or Not)
The short version: the two run together without breaking anything, but they want opposite things from your screen. Stage Manager reserves a strip along one edge and pulls windows into groups; Rectangle mac keeps snapping into whatever area is left. Hide the strip, allow multiple windows per set, and most of the friction goes away. If your layouts keep collapsing anyway, pick one.
They aren’t fighting, they disagree
This isn’t a conflict in the technical sense. There’s no permission clash, no stolen shortcut, nothing to repair. Both features work exactly as designed at the same time. The problem is that their designs point in opposite directions.
Stage Manager exists to show you one thing at a time. It gathers windows into sets, displays the active set, and parks everything else in a strip at the side. Rectangle exists to put several windows on screen at once in an arrangement you chose. Run both and you’re asking macOS to hide windows and show them simultaneously.
Which explains why nothing on this page is a fix in the way the other troubleshooting guides have fixes. It’s a set of adjustments that make the disagreement quieter.
Your screen got smaller
The first thing people notice is that half-screen windows stop reaching the edge. Press Left Half and the window lands short of the left border, with a gap where the strip lives.
Rectangle is behaving correctly. It snaps into the usable area macOS reports, and Stage Manager has reserved part of that area for itself. Half of what’s left is not half of your monitor, and on a laptop display the difference is large enough to notice immediately.
The adjustment is to stop the strip claiming space permanently. In System Settings → Desktop & Dock, set recent applications to appear only when you move the pointer to the edge. The strip then overlays on demand instead of reserving width, and Rectangle gets the full screen back for its calculations.
On an ultrawide this matters less, since a reserved strip costs you a smaller share of a very wide canvas. On a 13-inch MacBook it’s the difference between a workable two-window layout and a cramped one.
Windows that won’t stay where you put them
The harder problem: you arrange three windows across the screen, click one, and the other two disappear into the strip.
Stage Manager decided those windows belong to different sets, and showing one set means hiding the others. Your layout didn’t break, it got filed. This is the behavior that makes people give up on running both.
You can push back on it. Stage Manager can keep several windows in one set, so windows you arranged together stay visible together, and its settings control whether new windows join the current set or start their own. Getting this right takes some experimenting with your actual apps, because grouping behavior depends on which apps you’re switching between and how you opened the windows.
Be honest about the outcome, though. You’re configuring a feature to stop doing the thing it was built for. If you find yourself fighting it every day, the answer isn’t a better setting.
Choosing one
Ask what a good working session looks like for you.
If it’s deep focus on one task with fast switching between contexts, a writing set and an email set and a design set, Stage Manager is genuinely good at that, and Rectangle’s role shrinks to positioning the occasional window. Keep both, expect little from the combination, and you’ll be fine.
If it’s an editor beside a terminal beside a browser, all visible, all the time, Stage Manager is working against you every minute of the day. Turn it off in System Settings → Desktop & Dock and let Rectangle own the screen. This is the more common answer among people who went looking for a window manager in the first place.
Worth noting that Stage Manager isn’t the only macOS feature competing for the same territory. Sequoia’s native drag-to-edge tiling overlaps with Rectangle’s snap areas in a similar way, and that one has its own set of symptoms and fixes.
A middle path worth trying
One setup gets less attention than it deserves on a two-monitor desk: Stage Manager on the laptop screen, off on the external.
Stage Manager is a per-display feature in practice, and a small laptop panel is where one-window-at-a-time makes the most sense, while a large external is where you want a dense Rectangle layout. Reference material and chat apps cycle through sets on the small screen, your actual work spreads across the big one.
It isn’t for everyone, and it takes a session or two before the two halves of the desk stop feeling like different computers. But if you’ve been switching Stage Manager on and off depending on what you’re doing, this is probably the setup you were reaching for.
Frequently asked questions
Can Rectangle and Stage Manager run at the same time?
Yes. They don’t conflict at the permission level and both stay functional. Rectangle keeps snapping windows, though it snaps them into the reduced area Stage Manager leaves available, and Stage Manager may regroup windows after you arrange them.
Why do my Rectangle halves not reach the edge of the screen?
Stage Manager reserves a strip along one side of the display for its window groups. Rectangle treats the remaining region as the usable area, so a half-screen window fills half of what’s left rather than half the physical screen. Hiding the strip restores the full width.
Does Stage Manager undo my Rectangle layout?
It can. Stage Manager organises windows into sets and shows one set at a time, so arranging several windows side by side conflicts with its central idea. Allowing multiple windows in a single set reduces this, but the two features are pulling in different directions by design.
Should I use Stage Manager or Rectangle?
It depends on how you work. Stage Manager suits focusing on one task at a time with quick switching between grouped sets. Rectangle suits seeing several windows at once in a fixed arrangement. People who want a dense multi-window layout generally find Stage Manager works against them.
