Losing the Downloads folder from your Mac Dock is a common occurrence, usually caused by an accidental click and drag that "poofs" the icon away. Because the Dock icon is just a shortcut (an alias), the actual folder and its files remain safely on your hard drive.
: Click the Finder icon (the blue smiley face) on the far left of your Dock. mac os x restore download folder dock
Here is how to restore the Downloads folder to your Mac Dock and customize it to look like it did before. Step 1: Locate the Downloads Folder in Finder Losing the Downloads folder from your Mac Dock