Apple iMac 21.5" Retina 4K 3.6GHz 8GB 512GB SSD is a desktop computer that was released in with a 21.5-inch glossy display with a resolution of 1920 x 1080 pixels, which is not very high compared to modern standards, but still decent for everyday tasks. It also has a FaceTime HD camera, a backlit keyboard, and a MagSafe 2 power port

This model has a 21.5" 4096x2304 LED-backlit 16:9 widescreen IPS DCI-P3 "Retina 4K" display (that runs "pixel doubled" to look like 2048x1152). The rear of the case is aluminum and is thicker in the middle and tapers to a razor thin 5 mm at the edges.

Key Features:

• Incredibly thin, seamless aluminum enclosure
• Revolutionary 21.5-inch 4K Retina model
• Spectacular image quality
• Edge to cutting edge
• Intel 8th Gen Core i3-8100 Quad-Core 3.6GHz CPU
• 6MB SmartCache
• 8GB RAM
• 512 GB SSD
• Integrated audio with stereo speakers
• AMD Radeon Pro 555X Graphics w/2GB GDDR5 VRAM
• 10/100/1000 Gigabit Ethernet LAN
• 802.11ac Wireless LAN
• Bluetooth Wireless 4.2
• SDXC card reader
• macOS
• Model : MRT32LL/A
• Built-in FaceTime HD camera and microphone
• Kensington lock slot
• 21.5-inch LED-backlit Retina 4K display with IPS technology (4096 x 2304)