What the green plus sign means when you drag a file on a Mac

A green circle with a plus sign beside the pointer means the drop will make a copy: afterwards the file exists in both places. No badge means a plain move. You can switch between the two while you are still holding the file, by pressing Option or Command before you let go.

Every badge you can see during a drag

macOS tells you what a drop will do before you commit to it. The signal is a badge attached to the pointer or to the icon you are dragging.

• No badge. A move. The file leaves its old folder and appears in the new one. This is what Finder does between two folders on the same disk.
• Green circle with a plus. A copy. The original stays where it was and a second file is created at the destination.
• Curved arrow. An alias. Finder creates a pointer to the file instead of moving or copying it; opening the alias opens the original. You see this while holding Option and Command together.
• Red circle with a number. A count of the items you are dragging. It appears alongside the other badges, so a 3 and a green plus together mean three copies are about to be made.
• Circle with a slash through it. Not here. The spot under the pointer will not take what you are holding. If you let go, the item slides back to where it came from. Why an app refuses a file you drag onto it lists the usual reasons.
• An x, or the word Remove. You are pulling a shortcut out of the Finder sidebar or the Dock. Letting go removes the shortcut only, never the folder or app it points to.

Why the green plus shows up when you did not ask for a copy

Most people meet the plus sign by surprise. One of these is usually the cause.

• The destination is on a different disk. Dragging to or from a USB drive, a memory card, a disk image or a network share copies by default. Finder will not take a file off one disk as a side effect of a drag.
• The file is locked. A file with Locked checked in its Get Info window is copied rather than moved, even between two folders on the same disk. Select it, press Command-I and uncheck Locked if you want it to move.
• You cannot change the source folder. Dragging out of a place you only have permission to read (a shared folder, an installer’s disk image) gives you a copy, because the original cannot be taken away.
• Option is held down. A finger resting on the Option key is enough. Let go of the key and watch the badge disappear.
• The destination is an app, not a folder. Dropping a file into an email, a note or a document shows the plus because the app takes its own copy and leaves your file alone. Terminal shows it too, although what arrives there is the file’s path as text, not the file.

Change the result before you let go

The modifier keys work in the middle of a drag, and the badge updates as you press them.

• Option forces a copy. The green plus appears.
• Command forces a move, even to another disk. The plus disappears. Finder copies the file across and removes the original once the copy has finished.
• Option and Command together make an alias. The curved arrow appears.
• Esc cancels the drag and puts everything back.

The order matters at the end. Press the key, check the badge, release the mouse button or lift your finger from the trackpad, and only then let go of the key. If you release the key first, the badge changes back and so does the result.

Copy, move, or alias when you drag a file on a Mac goes deeper on when each one is the right choice, and How to cancel a drag on a Mac before you drop it covers the ways out.

If you let go and got the wrong one

1. Press Command-Z in Finder straight away. The Edit menu shows Undo Move or Undo Copy, and choosing it reverses the drop.
2. If you wanted a move and got a copy, check that the new copy opens, then put the original in the Trash. Or undo and drag again while holding Command.
3. If you wanted a copy and got a move, undo and drag again while holding Option.

Undo works only while the drop is still the last thing you did in Finder. How to undo a file move you did by dragging explains what to do once that chance has passed.

If you would rather not rely on badges at all, use the keyboard. Select the file and press Command-C, open the destination folder and press Command-V for a copy, or Option-Command-V to move the file there instead. How to cut and paste files on a Mac has the full routine.

Taking the long drag out of the picture

Badges are easy to read on a short drag between two windows that sit side by side. They are easy to miss on a long one, when you are holding a file, a modifier key and your breath while hunting for a window buried under four others.

Ledge shortens that trip. Drag the file up to the notch at the top of the screen and let go. It lands on a shelf that drops from the notch and stays there until you take it somewhere. Bring the destination forward at your own pace, press Option-Space or click the notch to open the shelf, and drag the file the short distance that is left.

The destination then decides what it receives. A Finder folder gets the file itself, so the file moves there. A chat app gets an upload. A terminal gets the file’s path as text, and a link becomes a webloc file. You do not pick a format or hold a key across the whole screen. When what you want is specifically a second copy in another folder, Finder’s own Option-drag or copy and paste is still the direct tool for the job.

Ledge runs on macOS 14 Sonoma or later. On a Mac without a notch, the shelf sits at the top center of the screen.

Questions

Does the green plus mean the file will be duplicated in the same folder?

No. It means a copy will be created wherever you drop. To duplicate a file in place, select it and press Command-D.

Why is there a green plus when I drag a file into an email?

The mail app attaches a copy of the file to the message. Your original stays in its folder, untouched.

Can I make Finder always move files between disks instead of copying?

There is no setting for it. Hold Command as you drop and that drag becomes a move.