Apple iMac 21.5-inch Retina 4K 3.6GHz Core i3 16GB 1TB HDD 2019 MRT32LL/A

Compact all-in-one for everyday macOS workflows

This 21.5‑inch iMac ships with a 3.6 GHz quad‑core Intel Core i3‑8100, 16 GB of DDR4 memory and a 1 TB hard drive. The 4096 x 2304 Retina 4K display, AMD Radeon Pro 555X graphics with 2 GB GDDR5 and macOS are ready for office tasks, media consumption and light creative work. A FaceTime HD camera, stereo speakers, SDXC slot, four USB 3 ports, three Thunderbolt ports and Mini DisplayPort output are built in, alongside a USB keyboard and optical mouse. Gigabit Ethernet and 802.11n Wi‑Fi handle wired and wireless networking.

Fits on any desk with a single power cable

The all‑in‑one chassis integrates the 21.5‑inch Retina 4K panel, compute, storage and I/O, so no separate tower or monitor cables are required. Four USB 3 ports and three Thunderbolt ports free up connectivity for external drives, docks or additional displays. The SDXC card slot simplifies photo and video import. Gigabit Ethernet and 802.11n Wi‑Fi provide network access without extra adapters. Memory can be expanded up to 64 GB DDR4 if workloads grow. The included USB keyboard and optical mouse complete the input set.

Replaces older all‑in‑ones

Moving from a pre‑Retina iMac or a non‑SSD desktop eliminates the mechanical drive bottleneck for boot and app launch. The 4K Retina panel upgrades text clarity and colour accuracy over standard 1080p screens. Radeon Pro 555X graphics with 2 GB GDDR5 step up from integrated graphics for smoother photo editing and video playback. The jump is worthwhile when a compact, cable‑free macOS station with Thunderbolt expandability and user‑upgradeable memory matches the workflow.