The LiteOn PA-1311-2A2 Mini 12-Pin 300W AIO Desktop Power Supply is a compact and efficient power supply unit designed specifically for Apple desktops, including the 27'' iMac A1419. With passive cooling, this power supply quietly delivers a maximum power output of 300W, ideal for powering your computer system smoothly. The Mini 12 Pin connector ensures compatibility with the specified Apple model, making it a reliable choice for your desktop setup.