I tried and failed to make a customised icon on the mavericks desktop using this method: http://lifehacker.com/5897796/how-to-customize-any-folder-or-app-icon-using-any-image-in-os-x My workaround was to boot up in lion and access the mavericks partition and change the icon from lion. That worked. But one shouldn't have to do it this way. It should work in mavericks. Is it a bug? Or is there a different way to do it in mavericks?