Apple iMac 21.5-inch (A1418, Late 2015) . Intel Core i7  16 GB RAM 1 TB HDD, and Intel Iris Pro Graphics 6200 — 4K display

Apple iMac 21.5-inch (A1418, Late 2015) — Retina 4K IPS All-in-One Desktop. Intel Core i7  16 GB RAM 1 TB HDD, and Intel Iris Pro Graphics 6200 — 4K display Display 21.5-inch Retina 4K IPS Display Resolution: 4096 × 2304 Wide-color (P3) support LED-backlit, high-brightness panel Processor (CPU) Intel Core i7 (Quad-Core, 6th Generation “Broadwell”) Base frequency around 3.3 GHz, Turbo Boost up to approx. 3.8 GHz Excellent single-core performance for macOS applications Memory (RAM) 16GB LPDDR3 1867 MHz Soldered onboard (not user-upgradeable) Storage 1TB HDD, 2.5″ 5400rpm Supports hybrid Fusion Drive or SSD in certain configurations if upgraded Graphics Intel Iris Pro Graphics 6200 Supports the 4K internal display & external displays via Thunderbolt Connectivity & Ports Wi-Fi 802.11ac, Bluetooth 4.0 2 × Thunderbolt 2 ports 4 × USB 3.0 ports SDXC card slot Gigabit Ethernet (RJ-45) 3.5mm headphone/optical audio out Audio & Camera Stereo speakers Dual microphones FaceTime HD webcam Design Slim aluminum unibody Built-in stand All-in-One desktop with all components integrated behind the 4K display Operating System Originally shipped with macOS 2015 version Supports later macOS updates compatible with the hardware