I changed my Macintosh HD icon to a picture of a MacBook. I would like to change it back, but when I hit CMD-X (if that's right), nothing happens. Any ideas? Thanks.
Click on your Macintosh HD so it's highlighted. Press the command key + the I key to Get Info. In the Get Info window click on the Macintosh HD icon so it's highlighted. Press the delete key. It will revert to the original icon. Close the Get Info window.