Windows Users When image has loaded place mouse cursor over image and right click on image. Select and click from the pop up menu "set as walllpaper or background." Mac Users Wait for the image to fully download, then click and hold on the image. Select "Save" or "Download image to disk" from the pop-up (depending on your browser), to save it on your computer. Then open the Desktop Pictures control panel, and drag the image into the window. Click "Set Desktop." .