A request :)
The spinning wait cursor is a cursor in Apple’s Mac OS X that indicates an application is not responding to system events. It is similar to the “not responding” status in the Microsoft Windows task manager.
The Apple Human Interface Guidelines officially refer to it as the “spinning wait cursor”; its colloquial names include “spinning pizza”, “spinning pinwheel”, “the beach ball of hell”, “spinning beach ball of death”, “Spinning beach ball of impending doom”, “spinning wheel of death”, “rainbow wheel of death”, and “marble of doom”.
The suffix “of death” in these names is a reference to Microsoft Windows’ Blue Screen of Death (BSOD), which also leads to the acronym “SPOD” for “spinning pizza of death,” commonly used in mailing lists such as Mac-L. The suffix ‘of doom’ is also commonly used. The act of an application getting the spinning wait cursor is often referred to as “beachballing”.