The iMac 21.5" LED Widescreen Computer Model A1311 is a sleek silver all-in-one desktop from Apple, featuring an Intel Quad Core processor with a speed of 2.50 GHz, 4 GB of RAM, and AMD Radeon HD 6750M GPU. It has a 21.5-inch screen, 500 GB hard drive capacity, and runs on macOS 10.13 High Sierra. This iMac also includes built-in camera, speakers, microphone, and an SD card slot. Needs new OS installed.