The Mac OS pointer icon of a colorful spinning wheel indicating the program currently under the mouse pointer is no longer responding. Called the beachball of death if the program never recovers or causes the operating system to become so busy (usually due to insufficient memory) that nothing else responds.
by esmith512 December 19, 2007
The funny icon you see spin when your Mac is freezing up. Not so cute when you have to do a hard reset
by Benji Bane February 28, 2008