The Problem with Dynamic Spaces
macOS features a powerful window management system called Mission Control, which allows you to create multiple virtual desktops (called “Spaces”) to organise your applications. By default, Apple tries to be helpful by automatically rearranging the order of your Spaces based on your recent use. If you spend ten minutes working in Space 4, macOS will silently slide Space 4 to the front of the queue, right next to your primary desktop. For users who rely on muscle memory and expect specific applications to always be in specific locations (e.g., mail in Space 2, browser in Space 3), this constant shuffling causes massive confusion.
How to Lock Mission Control Spaces in Place
You can easily stop macOS from trying to guess your workflow by disabling the automatic rearrangement feature, forcing your virtual desktops to stay exactly where you placed them.
1. Click the Apple logo () in the top-left corner of the menu bar.
2. Select System Settings from the drop-down menu (or System Preferences on older versions of macOS).
3. In the left-hand sidebar, click on Desktop & Dock.
4. Scroll down to the bottom of the right-hand pane until you reach the Mission Control section.
5. Locate the toggle switch labelled Automatically rearrange Spaces based on most recent use.
6. Click the toggle switch to turn it Off.
Organising Your Static Spaces
Once you disable this setting, your Spaces will become completely static. You can now press the F3 key (or swipe up with three fingers on your trackpad) to enter the Mission Control overview. At the top of the screen, you can click and drag the thumbnail images of your Spaces to arrange them into your preferred, permanent order. No matter which applications you use the most, macOS will never alter this layout again.