iMac Specifications 21.5-inch Retina 4K (2019) Display: 21.5-inch Retina 4K, 4096 × 2304 resolution, wide color Operating System: macOS Big Sur 11.7.10 Processor: 3.6 GHz Quad-Core Intel Core i3 Memory (RAM): 8 GB DDR4 2400 MHz (configured as 4 GB + 4 GB) Graphics: Radeon Pro 555X 2 GB GDDR5 Storage: 1TB Ports & Connectivity: 2 × Thunderbolt 3 (USB-C) 4 × USB-A 3.0 Gigabit Ethernet SDXC card slot 3.5 mm headphone jack Wi-Fi 802.11ac, Bluetooth 5.0 Condition: Appears fully functional and ready for macOS updates.