iMac (Slot Loading): Different Functionality for Power Button

The iMac (Slot Loading) power button works differently than the power buttons of earlier iMacs and Macintosh computers.
This table explains what happens when you press the power button on an iMac (Slot Loading) computer. The Power button on the keyboard works the same as it does on earlier iMac computers.
Current iMac StateResult of Pressing
Powered onPuts iMac to sleep unless connected to file server, then alert box presented
Powered on but not responsivePress and hold for five seconds to shut down iMac.
Powered off or in sleepPowers on or wakes from sleep
Published Date: Feb 20, 2012