You wouldn’t think finding the old 70′s Apple logo as an icon for Mac OS would be hard, but apparently it is. I just made my own. Here it is.
1. To use this icon, select it in the finder, and hit ⌘-i to bring up the info window.
2. Then select the icon, and hit ⌘-c to copy it into memory.
3. Then select the icon you want to change to the Apple logo, and hit ⌘-i on that.
4. Select the icon, then hit ⌘-p and it will paste it in.