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Apple MRT32LL/A iMac 4K 21.5-inch i3 1TB HDD Renewed — main product image
Apple MRT32LL/A iMac 4K 21.5-inch i3 1TB HDD Renewed
Apple MRT32LL/A iMac 4K 21.5-inch i3 1TB HDD Renewed
Apple MRT32LL/A iMac 4K 21.5-inch i3 1TB HDD Renewed
Apple MRT32LL/A iMac 4K 21.5-inch i3 1TB HDD Renewed
Apple

Apple MRT32LL/A iMac 4K 21.5-inch i3 1TB HDD Renewed

★★★★★5.0 (4 reviews)
4K4096x23041TB HDDBluetooth 4.2

A renewed 21.5-inch iMac with a stunning Retina 4K display, quad-core i3 processor, and 16GB RAM at a fraction of the original price.

$540.00*
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*Price sourced from Amazon.com. Last updated:Jun 08, 2026.Price and availability are subject to change.

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Overview

The Apple iMac MRT32LL/A (Early 2019) packs a vibrant 21.5-inch Retina 4K display into Apple's signature all-in-one aluminum enclosure. With a resolution of 4096 x 2304, the screen delivers over 9.4 million pixels — ideal for photo editing, design work, and anyone who values sharp text and rich color on a daily basis. Under the hood, a 3.6GHz quad-core Intel Core i3 processor paired with 16GB of 2400MHz DDR4 memory handles everyday computing tasks, web browsing, office productivity, and light creative work with ease. The AMD Radeon Pro 555X GPU supports the 4K display and provides enough graphics muscle for photo editing and casual video work.

Storage comes in the form of a 1TB traditional hard disk drive, which offers ample capacity but is the most notable compromise — boot times and app launches will be slower compared to SSD-based systems. Connectivity includes 802.11ac Wi-Fi and Bluetooth 4.2, along with a built-in FaceTime HD camera for video calls. As a renewed unit, this iMac offers a cost-effective path to Apple's 4K ecosystem, though buyers should be aware of the non-upgradeable RAM and the eventual end of macOS support for this generation of hardware.

Key Features

21.5-inch (diagonal) Retina 4K display (4096x2304 resolution)

3.6GHz quad-core Intel Core i3 processor

16GB of 2400MHz DDR4 memory | 1TB Hard Drive

Radeon Pro 555X | FaceTime HD camera

802.11ac Wi-Fi wireless networking; IEEE 802.11a/b/g/n compatible | Bluetooth 4.2 wireless technology

Specifications

Brand
Apple
Model
MRT32LL/A (Early 2019)
Display
21.5-inch Retina 4K (4096 x 2304)
Processor
3.6GHz Quad-Core Intel Core i3
Memory
16GB 2400MHz DDR4
Storage
1TB HDD
Graphics
AMD Radeon Pro 555X
Camera
FaceTime HD
Wi-Fi
802.11ac (a/b/g/n compatible)
Bluetooth
4.2
Color
Silver
Condition
Renewed

Pros & Cons

👍 Pros

  • Retina 4K display at 4096 x 2304 delivers exceptional color and detail for its size
  • 16GB RAM provides comfortable headroom for multitasking and moderately demanding applications
  • All-in-one design keeps the desk clean with no separate tower or cables to manage
  • Renewed pricing makes Apple 4K hardware significantly more accessible

👎 Cons

  • 1TB traditional HDD is noticeably slower than an SSD for boot times and application launches
  • Quad-core i3 processor is entry-level and may struggle with intensive video editing or 3D rendering
  • RAM is soldered and cannot be upgraded beyond the included 16GB
  • As a 2019 model it will eventually lose macOS software update support
  • Bluetooth 4.2 is an older standard that lacks the efficiency and range of Bluetooth 5.0

Frequently Asked Questions

It means the iMac has been inspected, tested, and restored to working condition by a qualified refurbisher, offering a more affordable way to get Apple hardware.
The 21.5-inch Retina 4K display runs at 4096 x 2304 resolution, delivering sharp detail and vibrant color for creative work and everyday use.
The 21.5-inch iMac (2019) has soldered RAM that cannot be upgraded after purchase. The 1TB HDD could potentially be replaced, but it requires significant disassembly.
This is an Early 2019 iMac, model number MRT32LL/A, featuring the 21.5-inch Retina 4K display configuration.
It features an AMD Radeon Pro 555X dedicated GPU, which handles the 4K display and provides reasonable performance for photo editing and light creative tasks.

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