gistfile1.m

NSAppleEventDescriptor *target = [NSAppleEventDescriptor descriptorWithDescriptorType:typeApplicationBundleID
                                                                                 data:[@"com.apple.Finder" dataUsingEncoding:NSUTF8StringEncoding]];
NSAppleEventDescriptor *quitEvent = [NSAppleEventDescriptor appleEventWithEventClass:kCoreEventClass
                                                                             eventID:kAEQuitApplication
                                                                    targetDescriptor:target
                                                                            returnID:kAutoGenerateReturnID
                                                                       transactionID:kAnyTransactionID];
OSStatus err = AESendMessage([quitEvent aeDesc],    //  theAppleEvent
                             NULL,                  //  reply
                             kAENoReply,            //  sendMode
                             0);                    //  sendPriority
NSAssert1( err == noErr, @"AESendMessage failed: %d", err );