This Apple iMac 21.5" A1311 Mid-2011 is a powerful all-in-one desktop computer that delivers fast processing speeds with its Intel i5 2.5GHz processor and 8GB RAM. It's perfect for office work, casual computing, and light gaming. The computer runs on macOS High Sierra and has a 500GB HDD with an additional 1TB SSD capacity for storing all your files. This Apple iMac comes with a built-in camera, optical drive, speakers, microphone, Wi-Fi adapter, Bluetooth adapter, and memory card reader. It has an AMD Radeon HD 6750M graphics processor with 512 MB of dedicated memory. The unit has a 21.5-inch screen and is silver in colour. It has various connectivity options including DisplayPort, HDMI, USB 3.0, and USB 2.0. This all-in-one desktop computer is part of the Apple iMac product family and has a model number A1311.