IMac performance is at an all-time high with faster Intel Core processors, powerful Radeon Pro 500 series graphics, Thunderbolt 3 (USB-C) connectivity and stunning Retina 4K and 5K displays that shine 43 per cent brighter and support one billion colours. CPU and Memory: Intel Core i5 quad core. Processor speed 3GHz. 8GB RAM. Hard drive: 1TB storage. Graphics: ATI Radeon pro 555 graphics card with . Interfaces and connectivity: SDXC media card reader. 4 x USB 3.0 ports. Ethernet port. Bluetooth. Wireless/Wi-Fi enabled. Webcam and sound: 2 channel sound system. Wireless keyboard and mouse. Operating system and software: Mac OS. Monitor: 21.5in display. Resolution 4096 x. 2304 pixels. General features: Size H45, W52.8, D17.5cm. Weight 5.66kg.