I'm a newbie to Launch agent and daemons. Now I'm currently developing the remote desktop (like VNC) application for macOS with Objective-C and my application supported macOS versions are 10.6 and later. I have created a pre-login agent and it will launch my application when login window open.I am using CGEventPost to simulate keyboard and mouse events in user logged-in sessions. But it's not working in pre-login window (global login window)Citrix, LogMeIn are providing the remote controls in Pre-login window too. How are they doing it?Any help will be highly appreciated.Please refer the code//For KeyboardCGEventRef keyEvent = CGEventCreateKeyboardEvent( NULL, keyCode, down ) ;CGEventPost( kCGHIDEventTap, keyEvent ) ;CFRelease( keyEvent ) ;//For MouseCGEventRef event = CGEventCreateMouseEvent(eventSource, eventType, mouseLocation, mouseButton ); CGEventPost(kCGHIDEventTap, event);CFRelease(event);//Pre-login launch agent<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict> <key>Label</key> <string>my app label</string> <key>LimitLoadToSessionType</key> <string>LoginWindow</string> <key>RunAtLoad</key> <true/> <key>WorkingDirectory</key> <string>My app directory</string> <key>ProgramArguments</key> <array> <string>app absolute path</string> <string>service</string> <string>myservice</string> </array> <key>KeepAlive</key> <true/></dict></plist>