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Technical Q&As: Cocoa
Events are high-level messages sent to applications by the operating system. For example, when the user clicks the mouse, types a character, chooses a menu command, moves a window, or activates an application, Mac OS X dispatches an event to the appropriate application. Other forms of input, such as notifications, can be generated programmatically. Cocoa provides mechanisms and programmatic interfaces to assist applications in receiving and responding appropriately to events and other types of input.
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Background-only apps with NSStatusItems become active in 10.1 on NSStatusItem clicks (HTML)
QA1081: Preventing background-only apps from activating when their NSStatusItem(s) are clicked in Mac OS X 10.1.
 2001-10-30
NSTimers and Rendering Loops (HTML)
QA1385: Using Cocoa timers (NSTimer) to drive a rendering loop
 2004-10-04
Power Management; Policy Maker vs. Power Controller (HTML) ()
QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
 2002-02-13
Programmatically causing restart, shutdown and/or logout (HTML) ()
QA1134: Describes how to programmatically cause restart, shutdown, sleep or logout.
 2003-02-10
Why aren't my tracking rects working? (HTML)
QA1355: Describes a common mistake in setting up cursor-tracking rectangles.
 2004-12-02