This Apple iMac desktop computer boasts an Intel Core i5 3rd Gen. processor with a clock speed of 2.7GHz, making it an ideal choice for both office work and casual computing. The 21.5-inch screen size ensures comfortable viewing, while the 8GB RAM size and 1TB hard disk drive ensure sufficient storage and smooth performance. Equipped with an NVIDIA GeForce GT 640M graphics processing unit, this all-in-one desktop is perfect for running graphic-intensive software. Additional features include a built-in camera, speakers, Wi-Fi adapter, and microphone. The Late 2012 model comes pre-installed with Mac OS and is suitable for a wide range of applications. macOS Catalina is installed (Please note that Catalina is the only automatic OS update this model is capable of installing - there are tutorials online as to how to install later versions of MacOS)