Programmer's key

The Programmer's Key (later known as The Interrupt Key) Is a keyboard combination in which holding the command key and striking the power key either results in the Macsbug console or The Sad Mac error. the Sad Mac error only occurs on startup after pressing the Programmer's Key on Mac Computers with an Old World ROM.

After Mac OS 10 Released, the combination was removed, as the OS had built in debugging features.