The Spring-Loaded Trap
macOS features a navigation tool known as “Spring-loading.” This is particularly noticeable when dealing with folders that you have pinned to the right side of your Dock (next to the Trash can). If you click and hold a file, then drag it over one of these Dock folders, macOS assumes you want to place the file deep inside. After hovering for a split second, the folder will automatically flash and then “spring open,” revealing its contents in a new Finder window or a massive grid overlay, covering your screen so you can navigate further. While intended to be helpful, it often results in accidental, chaotic screen clutter if your mouse lingers for just a moment too long while dragging a file to the Trash.
Disarming the Spring Mechanism
To prevent accidental folder explosions and stop macOS from automatically expanding folders in the Dock when you hover over them, you must disable the spring-loading delay in the accessibility settings.
Click the Apple logo in the extreme top-left corner of your screen and select System Settings from the dropdown menu. In the left-hand navigation sidebar, scroll down and click on Accessibility. On the right-hand panel, look under the “Motor” section and click on Pointer Control. Scroll down this page until you find a toggle switch explicitly named Spring-loading delay. Click this toggle switch so it turns from blue to grey (Off). The change is immediate. You can now confidently drag files across your Dock, and even if you pause directly over a folder for several seconds, it will remain stubbornly closed until you explicitly click it.