Drag lock on a Mac trackpad, and when it actually helps

Drag lock is a trackpad setting that keeps whatever you are dragging attached to the pointer after you lift your finger. The drag only ends when you tap once. Turn it on in System Settings, under Accessibility, Pointer Control, Trackpad Options: switch on “Use trackpad for dragging” and set Dragging style to With Drag Lock.

It is the most forgiving way to drag on a Mac, because nothing drops until you say so. That is also its catch, and it is worth knowing both before you switch it on.

Turning it on

The setting lives in Accessibility rather than in Trackpad settings, which is why people miss it.

1. Open System Settings and choose Accessibility in the sidebar.
2. Click Pointer Control.
3. Click Trackpad Options.
4. Switch on “Use trackpad for dragging”.
5. Open the Dragging style menu and choose With Drag Lock.
6. Click OK to close the sheet.

The same menu offers Without Drag Lock and Three-Finger Drag. You can have only one at a time. Three-finger drag, and how it reassigns your other three-finger gestures, has its own guide: how to turn on three-finger drag on a Mac, and when to use it.

How a drag-locked drag works

A drag-locked drag starts with a tap rather than a press. In practice it looks like this.

1. Point at a file, say invoice-0412.pdf in Downloads.
2. Tap once, then put the same finger straight back down and slide (in effect a double-tap whose second touch stays down). The file comes with the pointer. No physical click is involved.
3. Lift your finger whenever you run out of trackpad. The file stays attached, hovering where you left it.
4. Put your finger down again anywhere on the trackpad and keep sliding. Repeat as many times as the trip needs.
5. When the file is over the destination folder, tap once. It drops.

The difference from the plain setting, Without Drag Lock, is step 3. Without the lock, lifting your finger ends the drag after a short pause, so a long trip has to be made in quick, overlapping strokes. With the lock, there is no time pressure at all. You can stop, look at the screen, find the folder, and continue.

Ordinary click-and-drag is unaffected. Press the trackpad down, move, release, and it works exactly as before. Drag lock only changes drags that you start with a tap.

Who it helps

Anyone for whom holding a click is hard. This is why the setting sits under Accessibility. A tremor, arthritis, a weak grip or an injured hand can make it painful or impossible to keep a trackpad pressed for the length of a drag. Drag lock removes the hold completely: the hand only ever taps and slides. If you are working one-handed for a while, using a Mac with one hand after an injury covers the other settings worth changing alongside it.

Long drags. Moving a file from the left edge of a laptop screen to a folder on an external display takes several finger-widths of trackpad. With drag lock, each lift is a pause rather than a risk.

Hovering on purpose. Spring-loaded folders open when you hover a dragged file over them, and the delay is set in the same Pointer Control pane, under Spring-loading speed. With drag lock, you can rest your hand while a folder springs open, then the next one, without keeping any pressure on the trackpad.

Resizing and moving windows. The same tap-then-slide works on a window’s title bar or edge: the window follows until you tap. Handy for precise placement on a big screen.

The downside: nothing ends until you tap

The same feature that protects a long drag creates a few surprises.

Forgetting the tap. You drag a file, get distracted, and leave it attached to the pointer. The next tap you make, wherever the pointer happens to be, drops it there. If the pointer is over a different folder by then, that is where the file goes. Command-Z in Finder undoes the move, provided you do it straight away.

Accidental taps. A palm resting on the trackpad edge, or a thumb brushing it, can count as the tap that ends the drag. If your files land in odd places, check how your hand rests while typing.

Double-tap habits. If you use Tap to click and double-tap to open files, a second tap that lingers a fraction too long starts a drag instead of opening the file. You will see the icon lift off and follow the pointer; tap once to drop it back in place, or press Escape.

Cancelling. Escape still works as the way out of a drag in Finder and most Mac apps, and the file returns to where it started. How to cancel a drag on a Mac before you drop it covers the apps where Escape is ignored and what to do instead.

Whether it suits you comes down to whether a stuck file now and then bothers you more than a dropped one.

Making the drag shorter instead

Drag lock makes a long drag possible. It does not make it short. If the destination is in another Space, under three windows, or in an app you have not opened yet, you are still carrying the file across all of that, just with more rest stops.

The other approach is to set the file down partway. Ledge puts a shelf at the notch at the top of the screen (at the top center on a Mac without a notch). Drag the file up there, tap to drop it if you are using drag lock, and the carry is over. Go and open the destination, arrange the window, then press Option-Space or click the notch to show the shelf and drag the file off to where it belongs. Two short drags replace one long one, and the shelf holds several files at once if you are gathering from different folders.

Each destination gets the form it can use: a Finder folder receives the file itself, a chat app receives an upload, and a terminal receives the path as text. Ledge needs no special permission for its shortcut, has no account, and sends nothing off your Mac.

Questions

Why is a file stuck to my pointer and following it around?

Drag lock is on and the drag has not ended yet. Tap once over a safe spot, such as the folder the file came from, and it drops. If you did not mean to turn drag lock on, change the Dragging style back in Trackpad Options.

Is there a drag lock for a mouse?

No. Drag lock is a trackpad setting. The Mouse Options button in the same Pointer Control pane covers scrolling only, so with a mouse the drag ends when you release the button. Dragging a file with a mouse without dropping it halfway covers Mouse Keys and the other ways around that.

Does drag lock work with a Magic Trackpad?

Yes. Trackpad Options applies to the built-in trackpad and to a Magic Trackpad connected to the Mac.

Should I choose drag lock or three-finger drag?

Choose drag lock if certainty matters most and you do not mind tapping to finish. Choose three-finger drag if you want the drag to end when you lift your fingers, and you can live with Mission Control and Space switching moving to four fingers.