Open Finder, find your app or folder, then press Cmd + Option while dragging it to the desktop. A shortcut (alias) will appear.
To change the icon picture, right‑click the shortcut → Properties → Shortcut tab → Change Icon . how do i create a desktop icon
Here’s a clear, step-by-step post you can use or share: How to Create a Desktop Icon (Shortcut) on Windows Open Finder, find your app or folder, then
Desktop icons (shortcuts) let you open your favorite apps, files, or folders with one click. Here’s how to make one in seconds. find your app or folder